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通知公告


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报告题目:高效量子精密测量

报告人:项国勇 教授 (中国科学技术大学)

时间: 2017年12月4日(周一)下午5:00

地点:光电所二层报告厅

摘要: 量子精密测量是伴随着量子信息技术的发展而发展起来的一个重要的研究领域。我们主要介绍如何实现超越经典标准量子极限的参数估计,包括量子相位估计,量子多参数估计,量子态的估计以及量子反馈控制在提高估计精度中的应用。

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报告题目:利用原子纠缠超越测量精度的经典极限

报告人:尤力 教授(清华大学)

时间: 2017年11月30日 (周四)下午5:00

地点:光电所二层报告厅

摘要: 关于测量的科学对人类至关重要。测量的精度决定了我们对自然的认知程度和相关自然规律的准确度。现行的精密测量通常基于单个物理系统或者它的多份拷贝,其测量精度受限于经典极限。建立多个相同体系之间的量子纠缠可以超越测量精度的经典极限。本报告将介绍一些基于原子物理系统的相关研究工作。

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报告题目:Reflecting on an alternative (parity-time-symmetric) quantum theory and its analog in optics

报告人:Prof.Ray-Kuang Lee高效量子精密测量(Institute of Photonics Technologies, National Tsing-Hua University,Taiwan)

时间: 2017年11月14日(星期二)下午5:00

地点:光电所二层报告厅

摘要: By no-signaling principle, we showed that parity-time (PT)- symmetric quantum theory as an extension of the quantum theory to non-Hermitian Hamiltonians is either a trivial extension or likely false as a fundamental theory. In addition to the implementation PT-symmetric optical systems by carefully and actively controlling the gain and loss, we show that a 2 × 2 PT-symmetric Hamiltonian has a unitarily equivalent representation without complex optical potentials in the resulting optical coupler. Through the Naimark dilation in operator algebra, passive PT-symmetric couplers can thus be implemented with a refractive index of real values and asymmetric coupling coefficients. Moreover, with a phase-space representation on the vicinity of an exceptional point, we show that a PT-symmetric phase transition from an unbroken PT-symmetry phase to a broken one is a second-order phase transition.

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报告题目:腔光力学与宏观机械振子的基态冷却及耦合调控

报告人:刘永椿 助理教授(清华大学)

时间: 2017年10月27日(星期五)下午5:00

地点:光电所二层报告厅

摘要: 光学微腔与机械振子的耦合所形成的腔光力系统可以为宏观机械振子的量子操控提供技术手段,从而将量子物理的研究拓展到宏观尺度。这使得人们能够定量地研究量子-经典边界,以及为量子精密测量和量子信息处理提供新的工具。本报告将介绍报告人在机械振子的基态冷却以及腔光力耦合调控方面的工作。首先,将机械振子冷却到量子基态是对其进行量子操控的先决条件,我们用非微扰方法建立了腔光力冷却动力学过程的统一理论框架,提出动态耗散冷却方案,显著降低强耦合区的冷却极限;提出耦合腔冷却方案,突破边带可分辨条件的限制。另外,腔光力系统中的强耦合是量子相干操控的必要条件,同时也是实验实现的难点,我们提出了频率匹配共振增强和复合微腔方案实现对耦合的有效调控,为耦合增强提供了新的实现手段。

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报告题目:混沌光通信应用研究

报告人:义理林 教授(上海交通大学)

时间: 2017年9月23日 上午10:00

地点:光电所二层报告厅

摘要:混沌光通信经过二十多年的研究,取得了长足的进展,目前已经实现10Gb/s信号传输100公里的城域网现网演示。但混沌光通信的进一步发展受到很多现实的制约。本报告主要介绍混沌光通信走向应用的技术障碍,以及解决这些障碍的技术途径。

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报告题目: Listening to space time vibrations

报告人:Prof. Jerome Degallaix(Laboratoire des Matériaux Avancés (LMA) CNRS– Lyon, France.)

时间: 2017年7月21日   下午5:00

地点:光电所二层报告厅

摘要:The recent announcements of the discovery of gravitational waves from the coalescence of two binary black holes has opened a new window to study the universe. The measurement of those extremely small perturbations of space time has only been possible thanks to the technological progress happening in the last two decades.In this presentation, we will come back to the astrophysical discoveries but the focus will be on the detector itself, a giant Michelson interferometer with state of the art large optics. Finally at the end of the talk, we will discuss the future projects in the field.

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报告题目: Quantum information with neutral atoms and Rydberg interactions

报告人:M. Saffman (University of Wisconsin-Madison)

时间:2017年7月15日 上午10点

地点:光电所二层报告厅

摘要:Rydberg interactions are now in use in many research groups for quantum information processing. I will present experiments showing the creation of entangled |W> states of ~10 atoms, and two-atom Bell states. While these experiments form a basis for future developments, scalable quantum computing will require improvement of many aspects of these experiments. I will address recent ideas and progress in several directions including doubly magic trapping for long coherence qubits,higher gate fidelity with shaped analytic pulses, and measurement free error correction, which leverages the potential of Rydberg interactions for efficient multi-qubit gates.

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报告题目: Magnetic solitons in a binary Bose-Einstein condensate

报告人:Chunlei Qu (BEC Center, University of Trento, Italy)

时间:2017.6.5(周一)上午11:00

地点:光电所二层报告厅

摘要:Since the first experimental realization of Bose-Einstein condensation (BEC) in 1995, many intriguing physics have been observed with ultracold atomic gases. For instance, solitons, the fascinating topological excitations of nonlinear systems that can move in their medium without losing their shape, have been engineered in BEC. I will talk about our recent results on the investigation of a new type of soliton, magnetic soliton, in a binary BEC. In the absence and in the presence of a coherent coupling between the two components, the magnetic soliton solutions exhibit interesting distinct features . I will also briefly discuss our recent experimental observation of the spin-dipole oscillation and polarizability of a binary condensate .

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报告题目: Microcavity Nonlinear Photonics

报告人:邹长铃 副研究员(中国科学技术大学)

时间:2017.5.25(周四)下午5:00

地点:光电所二层报告厅

摘要:The optical microcavities provide an excellent platform for strong light-matter interactions, due to their ultrahigh quality factor and small mode volume. The microcavities have been used for high sensitive sensing, low threshold lasing as well as single photon quantum gates by interacting with single emitters. Here, we explore the nonlinear optical processes in microcavities. By carefully engineering the geometry of microcavities, we demonstrated the coherent frequency conversion, narrow linewidth photon pair source, high efficient second harmonic generation, third harmonic generation, as well as frequency comb. These integrated nonlinear photonic devices, which are robust, compact and scalable, hold the great potential for future applications.

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报告题目: Optimal experimental test of macroscopic realism

报告人:薛鹏 教授 (东南大学)

时间:5月13日(周六)上午10:00

地点:光电所二层报告厅

摘要:Macrorealism, as defined by Leggett and Garg, posits that a macroscopic system always exists in a well-defined state and that it can be measured without disturbing it. From these assumptions follow a set of inequalities, the Leggett-Garg inequalities, which hold under macrorealism but can be violated by quantum mechanics. The degree to which quantum systems can violate these inequalities is bounded and, in particular, if the measurements on the system are genuinely dichotomic, the bound for these temporal inequalities is the same as the Tsirelson bound of the corresponding spatial Bell inequality. We realise a photonic Leggett-Garg test on a three-level system and implement measurements that admit three distinct measurement outcomes, rather than the usual two. In this way we obtain violations of a Leggett-Garg inequality significantly in excess of the Tsirelson bound. This underlines the difference between Bell and Leggett-Garg inequalities and hence spatial and temporal correlations in quantum mechanics. We also report violations of a second consequence of macrorealism, the quantum-witness equality, up to the maximum permitted for a three-outcome measurement.

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报告题目: From Superradiance Lattice to Topological Quantum Optics

报告人:Dawei Wang Department of Physics and Astronomy, Texas A&M University

时间:2017年5月11日 下午5:00

地点:光电所二层报告厅

摘要:Superradiance has grown into a major topic in quantum optics since Dicke’s seminal paper in 1954. Recently, timed Dicke states, the collective excitations of extended atomic ensembles by single photon absorption, have been found with interesting properties such as directional emissions and collective Lamb shifts. By combining the timed Dicke states with the electromagenetically induced transparency, we can construct a momentum-space tight-binding lattice, coined the superradiance lattice [1], which has been recently realized in BEC by Jing Zhang's group from Shanxi University. In this talk, I will introduce the basic concept of the superradiance lattice and its applications in quantum metrology [2] and optical diodes [3]. In particular, the Haldane model can be simulated in two dimensional superradiance lattices [4]. The same physics can be extended to a cavity QED system, simply a two-level system coupled with three cavities, where the chiral edge currents in a Fock-state lattices enables the preparation of Schrodinger cat states [5]. This study shows that the physics of topological insulators can be demonstrated in quantum optics systems and have important applications.

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报告题目:Development of high power femtosecond laser source and various kinds of UV and VUV laser generation

报告人:赵智刚 博士(东京大学 物性研究所)

时间:2017年4月5日 下午5:00

地点:光电所二层报告厅

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报告题目:单频光纤激光技术与器件

报告人:徐善辉 教授(华南理工大学 发光材料国家重点实验室)

时间:2017年4月5日 下午4:20

地点:光电所二层报告厅

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报告题目:Quantum simulation based on trapped ions

报告人:申恒 博士(奥地利科学院量子光学与量子信息研究所)

时间:2017年3月31日 下午4:30

地点:光电所二层报告厅

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报告题目:亚散粒噪声极限偏振仪的研制

报告人:冯胜 教授(湖北工业大学)

时间:2017年1月3日 下午5:00

地点:光电所二层报告厅

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报告题目:半导体n-GaAs及碱金属铷原子中的自旋噪声谱研究———“倾听”自旋的噪音,探索材料的奥秘

报告人:马健 博士(中国科学院半导体研究所)

时间:2016年12月23日 下午5:00

地点:光电所二层报告厅

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报告题目:Coherent Interaction between Single-Photon and Cold Atoms

报告人:张善超 博士(香港科技大学)

时间:2016年11月29日 上午10:30

地点:光电所二层报告厅

摘要:

        Manipulate photon-atom interaction on quantum level lies at the heart of modern quantum physics and quantum information science. In this talk I may briefly introduce series of my work related with single photons and mainly discussed the work of single photon storage in cold atomic ensemble. Firstly, a dark-line 2-dimensional magneto-optical trap and long coherence time (~1us) heralded single photons source will be presented. Followingly, improve optical quantum memory in dense cold atomic ensemble will be discussed mainly. In this work, benefit from the high optical depth of the atomic ensemble and the high controllabity of single photon waveform, we still kept the highest single-photon storage efficiency around 50%. I also will briely present my works including exploring the information speed limit of a single photon utilizing optical precursor phenomena, direct observation of photon absorption and reemission timing order and improved DPS-QKD protocal. Finally,I will share very shortly my current project in the ultracold degenerated Yb atomic gases.

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报告题目:硅芯片上微光学腔系统中控制:理论与实验进展

报告人:张靖 副教授(清华大学)

时间:2016.11.24 下午5:00-6:00

地点:光电所二层报告厅

摘要:

        硅芯片上微光学腔系统是目前微纳光子学领域研究的热点,围绕这一系统发现了很多新奇的物理现象,如光机械运动,声子激光,混沌等。报告将主要针对这一系统,介绍我们近期在理论与实验上取得的进展。主要包括两方面工作:(1)结合我们之前的工作提出的反馈非线性化的方法,近期我们发现,采用这一思想,可以在光机械系统中,打破系统的时空反演对称性(PT对称性),从而产生超低阈值的声子激光,并可用于传感,声子调控等,相关成果发表于物理顶级期刊Physical Review Letters等期刊;(2)结合我们之前提出的混沌扩频通信的方案,我们在近期的实验中实现了一种新的微纳光子学领域的弱光扩频方案。实验研究表明,利用光机械效应,可以实现混沌这一典型的强非线性效应从强光向弱光的传输,并在实验上首次观测到了光机械系统中的随机共振现象,这部分工作长文(Article)发表于Nature子刊Nature Photonics,并被Nature Photonics选为2016年6月刊的封面论文。

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报告题目:超导量子相干器件和量子计算

报告人:刘玉玺 教授(清华大学)

时间:2016.11.24 下午4:00-5:00

地点:光电所二层报告厅

摘要:

        经过近20年的发展,超导量子相干电路和超导量子计算取得了令人瞩目的跨越式发展。新设计的原型器件和相关的新物理现象接连涌现。量子比特相干时间从最初的纳秒级提升到百微秒级,寿命达到毫秒级。超导量子电路已达到了量子计算纠错的阈值条件并具有了容错功能。这些成就吸引了国际商业和政府机构的极大关注,比如谷歌,IBM,Intel等国际著名的公司开始设计和制造基于超导材料的量子信息处理器。本报告将基于超导量子电路过去的发展,结合个人的某些理论研究,对未来大规模超导量子信息处理在器件原理,量子仿真与纠错,信息的存储与操控,拓扑计算,量子程序运行等方面可能面临的一些理论问题做一梳理和探讨,以期进一步推动有关方面的理论研究。

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报告题目:光学微腔在高灵敏磁场检测中的应用

报告人:李贝贝 博士(北京大学物理学院)

时间:2016.11.19(周六)上午10:00

地点:光电所二层报告厅

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报告题目:Gravitational-Wave Detection Beyond the Standard Quantum Limit via EPR Entanglement

报告人:马怡秋博士 (美国加州理工学院)

时间:2016.11.3(周四)下午4:30

地点:光电所二层报告厅

Abstract:
          The Standard Quantum Limit in continuous monitoring of a system is given by the trade-off of shot noise and back-action noise. In gravitational-wave detectors, such as Advanced LIGO, both contributions can simultaneously be squeezed in a broad frequency band by injecting a spectrum of squeezed vacuum states with a frequency-dependent squeeze angle. This approach requires setting up an additional long base-line, low-loss filter cavity in a vacuum system at the detector's site. Here, we show that the need for such a filter cavity can be eliminated, by exploiting EPR-entangled signal and idler beams. By harnessing their mutual quantum correlations and the difference in the way each beam propagates in the interferometer, we can engineer the input signal beam to have the appropriate frequency dependent conditional squeezing once the out-going idler beam is detected. Our proposal is appropriate for all future gravitational-wave detectors for achieving sensitivities beyond the Standard Quantum Limit.

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报告题目:Time and frequency standard: Atomic Clock

报告人:Prof. Manzoor Ikram (National Institute of Laser and Optronics,Nilore, Islamabad,Pakistan)

时间:2016.10.19(周三)下午5:00

地点:光电所二层报告厅

Abstract:
          Cesium atomic beam clocks have been the workhorse for many demanding applications in science and technology for the past five decades. Tests of the fundamental laws of physics and the search for minute changes in fundamental constants, the synchronization of telecommunication networks, and realization of the satellite-based global positioning system would not be possible without atomic clocks. The adoption of optical cooling and trapping techniques, has produced a major advance in atomic clock precision. Cold-atom fountain and compact cold-atom clocks have also been developed. Measurement precision of a few parts in 1015 has been demonstrated for a cold-atom fountain clock. We present here an overview of the Pakistan's time and frequency metrology program based on cesium atoms. This activity consists of construction and characterization of atomic-beam, and several variations of cold-atom clocks. We discuss the basic working principles, construction, and evaluation. We also present here the research work towards compact atomic clocks based on atomic coherence effects.

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报告题目:窄带非简并纠缠光源的制备

报告人:王健 博士 (中国科学技术大学)

时间:2016.10.15(周六)上午11:00

地点:光电所二层报告厅

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报告题目:基于离子阱的量子模拟与量子计算

报告人:崔金明 博士 (中国科学技术大学)

时间:2016.10.15(周六)上午10:00

地点:光电所二层报告厅

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报告题目:固体量子存储

报告人:李传锋 教授 (中国科学技术大学)

时间:2016.10.15(周六)上午9:00

地点:光电所二层报告厅

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报告题目:Studying strongly correlated quantum physics based on ultracold strontium atoms

报告人:张熙博 副教授(北京大学量子材料科学中心)

时间:2016.9.21(周三)下午5:00

地点:光电所二层报告厅

摘要:

        Since the creation of Bose-Einstein condensates, ultracold atoms have been driving the quantum simulation of manybody physics. However, the power of cold-atom experiments will be enhanced even further by precision measurements, allowing interaction physics and manybody physics normally probed at nK temperatures to be studied at μK temperatures. This is precisely what was recently achieved using cold strontium atoms. On the basis of ultrastable lasers with 1×10-16 instability, the JILA strontium (Sr) optical clock realized a powerful laboratory to study a spin system with manybody dynamics. Here, s- and p-wave inter-atomic interactions are characterized to high precision, enabling a spectroscopic observation of SU(N £ 10) symmetry in 87Sr and beyond-mean-field correlations at μK temperatures. This study reveals a new route for pushing the frontier of emergent many-body physics.
        Going beyond experimental limitations requires combining extraordinary measurement precision with state-of-the-art techniques to cool, probe, and engineer quantum gases. High-spatial-resolution imaging is one such technique. It reveals equations of state and dynamics of a quantum gas, and allows engineering arbitrary trapping potentials for studying transport phenomena. I will discuss how degenerate Sr gases provide unique opportunities to explore strongly correlated quantum physics such as the fractional quantum Hall effect.

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报告题目:Unveiling Microscopic Structure at Interface With Better Surface Resolution

报告人:田传山 教授(复旦大学)

时间:2016.9.20(周二)下午5:00

地点:光电所二层报告厅

摘要:

        Surface and interface under non-vacuum environment are extremely important in nature and modern technology, for instance, friction, corrosion, surface catalysis and electrochemistry. Among very few available techniques that can probe such surface/interface, Sum frequency spectroscopy (SFS) has the advantages of being highly surface-specific with sub-monolayer sensitivity. Surface resolution of SFS is dictated by symmetry under electric dipole approximation. However, there still exist challenges for the current SF spectroscopy, which hinders advances of the field. In this talk, I will discuss on the following two problems: (1) Beyond the electric dipole approximation, the higher-order electric-quadrupole bulk contribution to surface SF generation may not be negligible. The problem has been the lingering doubt for decades, and is particularly important in dealing with media that do not have a strongly polar-oriented surface layer; (2) The second challenge is how to probe molecular structure of the first few monolayers at charged interface, e.g. charged water interface. Such atomically-thin layer governs the properties and functionality of the interface, including electron and energy transfer through interface in solar cell.

 

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报告题目:dark soliton in polariton BEC

报告人:薛艳 博士(吉林大学)

时间:2016年7月14日(周四)下午5:30

地点:光电所二层报告厅

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报告题目:Cross-Phase Modulation Based on Polarization-Sensitive Rydberg Blockade

报告人:吴金辉 教授(东北师范大学量子科学中心)

时间:2016年7月14日(周四)下午4:30

地点:光电所二层报告厅

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报告题目:Cold atoms and hot quark-gluon plasma

报告人:王福强 教授(湖州师范学院理学院)

时间:2016年7月13日(周三)下午5:00

地点:光电所二层报告厅

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报告题目:Hybrid reduced-noise amplification and its applications

报告人:赵洁 博士(澳大利亚国立大学)

时间:2016年7月13日(周三)上午11:00

地点:光电所二层报告厅

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报告题目:Quantum computing and precision measurement in cold atom traps

报告人:夏添 博士(中国科学技术大学)

时间:2016.7.7(周四)下午5:00

地点:光电所二层报告厅

摘要:
Part I: In University of Wisconsin-Madison, we have developed a 2D array of optically trapped single atom qubits for quantum computation experiments. We characterize single qubit Clifford gate operations with randomized benchmarking achieving global and site selected gates with fidelities close to fault tolerance thresholds for quantum computation. A two-qubit Rydberg blockade interaction provides a CNOT gate which is used to create entangled Bell pairs. The fidelity is characterized with parity oscillation measurements.
Part II: A permanent electric dipole moment (EDM) of an atom signifies the violation of both parity (P) and time-reversal (T) symmetries. Measurements of atomic EDM open a promising avenue towards new physics beyond the Standard Model. 225Ra is an ideal case due to a strong nuclear octupole deformation, making its atomic EDM more sensitive to T-violating effects. 225Ra is radioactive with a half-life of 15 days. 171Yb is a stable isotope with atomic properties and transitions similar to those of 225Ra. It is particularly useful as a proxy for testing various measurement schemes and investigating systematic errors. We propose to construct a cold Yb trap system for EDM measurement.

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报告题目:Optomechanical devices for improving the sensitivity of gravitational wave detectors

报告人:赵春农 教授(University of Western Australia)

时间:2016年6月28日(周二)下午5:00

地点:光电所二层报告厅

 

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报告题目:The role of Discord in Quantum Illumination

报告人:Jayne Elizabeth Donovan Thompson(National University of Singapore)

时间:2016年5月31日(周二)下午5:30

地点:光电所二层报告厅

摘要:Abstract:Quantum illumination, is a protocol which uses an entangled probe to detect the presence (x= 0) or absence (x=1), of a faint reflecting object which is bathed in intense noise. Remarkably while the noise injected into this system effectively kills all entanglement before the probe even interacts with the reflecting object, this precursory entanglement still helps us determine the value of x. This is considered highly paradoxical. How can the benefits of entanglement out-survive entanglement breaking noise?
          In this talk I will show that this paradox is resolved by a highly noise resilient type of quantum correlations known as quantum discord -- i.e. quantum illumination works, precisely because even after all entanglement in the initial probe state is destroyed, discorded correlations survive. Indeed I will show that there is a quantitative relation between the amount of discorded correlations, used to store the value of x, and the performance gap between quantum illumination and the best classical illumination protocols. In doing so we effectively kill two 'proverbial' birds with one stone. On the one hand we demonstrate the role of discord as a resource, in a prominent quantum protocol. On the other we demystify quantum illumination, providing a new way to understand and interpret this protocol.
 

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报告题目:Replicating the benefits of closed time-like curves without Breaking Causality

报告人:Mile Gu(新加坡南洋理工大学)

时间:2016年5月31日(周二)下午4:30

地点:光电所二层报告厅

 

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报告题目:Photonic Maxwell's Demon

报告人:Prof. Vlatko Vedral(英国牛津大学)

时间:2016年5月31日(周二)下午3:30

地点:光电所二层报告厅

摘要:Abstract:In my lecture I will explain the basis behind the relationship between thermodynamics and (quantum) information theory. I will show how our information about the system we are manipulating allows us to extract work from it. I will then discuss some basic results relating information to thermodynamical work and illustrate this using the concept of Maxwell's demon. Finally, I will present a quantum optical experiment where a simple photon subtraction process is used to gain information about the state of light which is then fed forward to extract electrostatic work from a capacitor. Understanding whether quantum physics offers any thermodynamical advantages presents one of the main open questions in this exciting field.

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报告题目:About states and modes in quantum optics
报告人:Prof. Claude Fabre(法国巴黎第六大学特级教授)

时间:2016年5月30日(周 一)下午4:00
地点:光电所二层报告厅

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报告题目:Spin-orbit coupling for ultracold atomic gases

报告人:Prof. Gediminas Juzeliūnas (Institute of Theoretical Physics and Astronomy, Vilnius University, Lithuania)

时间:2016年5月10日(周二)下午5:00

地点:光电所二层报告厅

摘要:In the initial part of the talk a background material will be presented on the spin-orbit coupling (SOC) for electrons and ultracold atoms. At present there is a great deal of interest in the SOC affecting the centre of mass motion of ultracold atoms. Subsequently we shall discuss some recent developments in the area. One of current challenges is to experimentally produce a two-dimensional (2D) SOC of the Rashba type. We shall discuss a novel way of creating the 2D SOC using a bilayer atomic Bose-Einstein condensate (BEC). It is shown that an interplay between the inter-layer tunneling, intra-layer Raman coupling, and intra-layer atom-atom interaction gives rise to diverse ground-state configurations for such a bilayer BEC. We shall also discuss some other recent work in the area, including the magnetically generated spin-orbit coupling.

 

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报告题目:The utility of quantum technologies

报告人:张利剑 教授(南京大学现代工程与应用科学学院)

时间:2016年4月22日(周五)下午5:00-6:00

地点:光电所二层报告厅

摘要: 量子技术,如量子通信、量子计算和量子传感,具有突破经典技术局限并将其性能推进到最终极限的潜力,因而受到广泛关注。然而要在实际应用中实现这种潜力,我们仍然面临很多挑战,其中包括如何克服实验噪声对于量子技术的影响,以及拓展量子技术的应用范围从而将其应用于经典技术无法解决的问题。在该报告中,我将汇报我们在这两个方面取得的一些初步进展,包括对噪声环境下量子精密测量方案的研究,以及对于光场与表面等离激元耦合过程的量子描述。

 

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报告题目:迈向芯片化集成化量子信息技术

报告人:金贤敏 教授(上海交通大学物理与天文系)

时间:2016年4月22日(周五)下午4:00-5:00

地点:光电所二层报告厅

摘要: 量子信息技术有望实现无条件安全的保密通信,随计算位呈指数增加的超高速计算,超越标准量子极限的精密测量和传感等革命性的技术飞跃。然而,宏观光学器件的尺寸、稳定性和集成度等看似技术上的限制,其实根本性地使得量子信息技术仍然只是停留在小尺度的原理性演示阶段。在科学上,通过芯片化构建大规模的量子系统将使得人类能够探索全新的量子世界和领域;在技术上,芯片化的量子器件和系统是推动量子信息技术实用化的必然,进而依托量子信息技术推动信息技术变革。报告将介绍我们针对宏观量子光学系统走向集成芯片面临的新问题开展的研究,包括在上海交大搭建的飞秒激光直写光量子集成芯片2.0平台、全光纤低损耗光耦合网络和量子光源上取得的研究进展。

 

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报告题目:波-粒延迟选择试验

报告人:郑仕标  福州大学物理系

时间:2016年4月16日(周六)上午10:00

地点:光电所二层报告厅

摘要: 波粒二象性是量子力学的一个基本特征,被著名物理学家费曼称为“包含了量子力学唯一的奥秘”。按照玻尔互补原理,一个量子系统同时具有波动性和粒子性,但这两种属性不能被同时观测到;系统表现出哪种属性取决于实验装置。为了诠释这一观点,Wheeler提出了延迟选择思想实验,即在粒子进入干涉仪后再选择实验装置的类型。在本报告中,我们先回顾经典的Wheeler延迟选择思想实验及其实验进展,然后说明量子延迟选择实验,并介绍其在光学系统中的实现。最后,结合超导电路系统,阐述基于类薛定谔猫分束器的量子延迟选择实验。

 

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报告题目:悬浮纳米球光力学系统检验CSL塌缩模型

报告人:李杰

         (School of Science and Technology, Physics Division,  University of Camerino, Camerino (MC), Italy)

时间:2016年3月17日(周 四)下午4:00

地点:光电所二层报告厅

摘要:(波函数)塌缩模型[1]是一类理论假说,通过在薛定谔方程中引入一个非线性随机项(未知的塌缩噪声所致),用以解释宏观物体量子现象的缺失,是对经典量子力学的修正。当物体的尺寸(大小,内部粒子数等)大于一个值时(CSL模型设为100nm),塌缩噪声开始发挥显著作用,从而破坏量子叠加态,使得宏观量子现象难以观测。一些工作试图证明未知塌缩噪声来自引力(引力所致塌缩模型,Gravity kills Schrodinger's cat),但目前仍存在较大的争议,实验检验各种塌缩模型是判断其准确或真伪的唯一途径。
      我们提供了一个理论方案[2],基于囚禁悬浮纳米球光力学系统,来检验目前最为流行的CSL塌缩模型。悬浮纳米球系统的优势是其Q因子极高,可达10^10,热噪声极小,从而(极小的)塌缩噪声与经典噪声可比拟,使得实验检验塌缩模型成为可能。

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报告题目:量子信息技术

报告人:郭弘 教授(北京大学)

时间:2016316(周 三)下午4:30

地点:光电所二层报告厅

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报告题目:Spin-Orbit Coupling and Topological Phases for Cold Atoms: Theory and Experiments

报告人:刘雄军 教授(北京大学)

时间:2016118(周一)下午4:30

地点:光电所二层报告厅

摘要:Cold atoms with laser-induced spin-orbit (SO) interactions provide intriguing new platforms to explore novel quantum physics beyond natural conditions of solids. Recent years have witnessed remarkable theoretical and experimental progresses in the study of synthetic spin-orbit coupling and exotic phases for cold atoms. In this talk, I will focus on the realization of two-dimensional (2D) SO coupling and topological phases, and introduce the recent experimental progresses. This talk is organized in three parts. The first part will briefly introduce the background of SO coupling and topological phases in both condensed matter physics and cold atoms. Then, I will focus on our recent scheme for realizing SO interactions and exotic topological phases for cold atoms. Finally, I will introduce the experimental progress in observing 2D SO coupling and topological band with 87Rb Bose-Einstein condensates in an optical lattice.
 

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报告题目:Harnessing single photons in quantum technology

报告人:马小松 教授(南京大学)

时间:2015年12月11日(周五)下午4:30

地点:光电所二层报告厅

摘要Quantum technology employs the ‘spooky’ phenomena of quantum physics such as superposition, randomness and entanglement to process information in a novel way. Quantum photonics provides a promising path for both delivering quantum-enhanced technologies, including quantum simulation [1] and quantum communication [2], as well as exploring fundamental physics, including realizations of delayed-choice experiments [3-4] and nonlocal quantum eraser [5].

In this talk, I will first present our work on long-distance free-space quantum teleportation [6]. Quantum and classical channels were employed over 143 kilometers between two Canary Islands (La Palma to Tenerife). We successfully teleported the quantum states of single photons from La Palma to Tenerife. This demonstration represents a major step towards the realization of quantum communication on a global scale.

It is foreseeable that future technologies will require integrated optics architecture for enhanced performance, miniaturization and scalability. In the second part of my talk, I will cover our recent endeavors along this line, including demonstrations of on-chip interaction-free measurements via the quantum Zeno effect [7], as well as on-chip single-photon detection. Finally, I will discuss the opportunities and challenges for improving the scalability of photonic quantum systems.

 

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报告题目:Gravitational Wave Astronomy

报告人:Prof. David Blair (University of Western Australia)

时间:2015年11月25日(周 三)下午4:00

地点:光电所二层报告厅

摘要:Long baseline advanced gravitational wave detectors represent the state of the art in optical and mechanical engineering, and are the most sensitive optomechanical instruments ever created. In 2015 the Advanced LIGO detectors began operating at a sensitivity sufficient to detect predicted gravitational wave events from the distant universe for the first time. These 4km instruments operate near to the quantum limits of sensitivity, and yet they have the opportunity of substantial improvement through advanced optical engineering and quantum optics.
This talk will review the status of gravitational wave detection, and will present ideas for future detectors that will take gravitational wave astronomy from exciting beginnings to an essential astronomical tool capable of monitoring the dynamical behaviour of spacetime arising from extreme events such as the birth of black holes across the universe. Plans for Australia-China collaboration in this field, recently funded by the Australian government, will be discussed.
 

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报告题目:Investigation of quantum hybrid systems formed of resonantly-coupled atoms/metamaterials

报告人:Prof. Martial Ducloy (Institute Galilee, University Paris-Nord)

时间:2015年10月23日(周五)下午4:00

地点:光电所二层报告厅

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报告题目:Improving linear optical "hardware" and "software" for quantum information processing

报告人:周晓祺 教授(中山大学 理工学院)

时间:10月17日(周六)上午10:00

地点:光电所二层报告厅

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报告题目:多体量子关联及其在量子信息中的应用探讨

报告人:何琼毅 研究员(北京大学物理学院)

时间:8月27日(周四)下午5:30

地点:光电所二层报告厅

摘要:量子纠缠、EPR steering(量子导引关联)、贝尔非定域性等量子关联是量子信息的核心资源,也是量子理论基础研究的重点问题。我们针对连续变量光场、原子系综、光力腔等物理系统,研究了不同量子关联的存在判据和实验检测方法,并针对量子技术需求,提出了相应的量子存储、精密测量、以及量子秘密共享等应用方案。本报告将主要介绍:基于多模光场系统以及微纳腔光机械复合系统的多体EPR关联的判定,以及相应的安全量子秘密共享方案。

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报告题目:超导纳米线单光子探测技术及其应用

报告人:尤立星研究员(中科院上海微系统与信息技术研究所,信息功能材料国家重点实验室)

时间:8月22日(周六)上午10:00

地点:光电所二层报告厅

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报告题目:Optical Hybrid Architectures for Quantum Information Processing

报告人:Dr. Kun Huang(Laboratoire Kastler Brossel, Paris)

时间:2015.8.15(周六)上午10:00

地点:光电所二层报告厅

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报告题目:Quantum networks with Ultrafast Frequency Comb

报告人:Prof.  Nicolas Treps (法国国家科学中心、LKB实验室)

时间:2015年7月13日(周一)下午4:30

地点:光电研究所二层报告厅

Nicolas的简历:Professor Nicolas Treps obtained his PhD in the quantum optics group of Laboratoire Kastler Brossel under the supervision of Claude Fabre, working on quantum effects in optical images. He then went to the Australian National University, group of Hans Bachor and Pink Koy Lam, for a post doctoral position on both quantum information and going beyond the standard quantum limit in high sensitivity optical measurement. Since 2002, he works at Laboratoire Kastler Brossel and University Pierre et Marie Curie, where he became full professor. After pursuing his work on quantum information and optical imaging, he started a new research line on quantum metrology and quantum information with optical frequency combs. His work led to about 80 papers in international peer reviewed journals and was funded by an ERC starting grant.

摘要: Ultrafast frequency combs have found tremendous utility as precision instruments in domains ranging from  frequency  metrology, optical clocks, broadband  spectroscopy, and 

absolute  distance measurement. This sensitivity  originates  from  the fact  that  a  comb  carries  a  huge  number  of co-propagating,  coherently-locked  frequency  modes. Accordingly, it  

is  the aggregate noise  arising  from  these  individual teeth  that  limits  the achievable  sensitivity  for  a  given measurement.  While  the distribution of  noise across  the comb  has  been 

examined, the role of correlations among various frequencies has gone largely unexplored. We have developed methods, inspired  from  quantum optics,  to  extract  amplitude  and phase  

correlations  among  a  multitude  of spectral bands. We can use it to study laser dynamics and perform quantum metrology experiments.

    But beyond characterizing the classical covariance matrix of an OFC, one can, using non-linear effects, manipulate this noise and eventually reduce it even bellow quantum vacuum noise, 

producing multimode nonclassical optical frequency combs. We have demonstrated that by proper control of non-linear crystals, optical cavities and pulse shaping it was possible to embed

 within an optical frequency comb up to 16 spectral/temporal modes  with  non-classical  noise  properties.  Furthermore,  dividing  the  spectrum  of  this  comb  into  10 frequency bands, 

entanglement is certified for all of the 115974 possible nontrivial partitions of this 10 mode state. This is the first demonstration of full multipartite entanglement and this source is shown to be

 a very promising candidate for scalable measurement based quantum computing.

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报告题目:Strong Atom-Light Interactions in Photonic Crystals

报告人: Prof.  Harry Jeffrey Kimble   ( California Institute of Technology , USA)

时间:2015年7月9日(周三)下午4:30

地点:光电研究所二层报告厅

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报告题目:弥散张量成像失真矫正及神经纤维束追踪

报告人:陈斌 教授 (美国Purdue University Calumet)

时间:2015年6月2日(周二)下午5:00

地点:光电所二层报告厅

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报告题目:Optical gain materials and coupled resonator structures for rotation sensing

报告人:Prof. Zhisong Xiao(Beihang University)

时间:2015.5.30(周六)上午10:00

地点:光电所二层报告厅

摘要:As a result of the rapid increase in information traffic there is a demand for broadband optical amplification beyond the conventional band of 1530-1625 nm (C+L-band) developed by erbium-doped amplifiers. In order to fully utilize the 1.4-1.7 mm low-loss band of silica-based optical fibers, the bands at 1440-1530 nm (S band) and 1625-1675 nm (U-band) are being explored. In this talk, we will also demonstrate how a very broad and flat emission band in the spectral region 1400-1700 nm can be achieved from RE codoped materials by adequately controlling the Er and Tm concentration ratio. Moreover, we will discuss how to control the concentration quenching due to cross-relaxation and energy diffusion to impurities.

Sagnac effect is investigated by related key optical factors like fast-light and active optical gain with coupled resonators, which allows for loss compensation, unidirectional propagation and enlarging the sensing area while maintaining the same bulk volume. In this case, the resonators are fabricated in Er3+ doped phosphate glass by the femetosecond laser directly writing (FsLDW). By introducing active gain into resonators to compensate the accumulated loss, it is theoretically predicted that the resolution limited by spontaneous emission noise is over three orders of magnitude smaller than that of the identical passive CROW gyroscope limited by the shot noise for the propagation loss of about 0.5 dB/cm.

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报告题目:Hybrid quantum information processing
报告人:Professor Akira Furusawa
(The University of Tokyo)
时间:2015年5月11日(周一),下午5:00
地点:光电所二层报告厅

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报告题目:Making larger entangled states of light

报告人:Professor Alexander Lvovsky

      (Department of Physics and Astronomy, University of Calgary, Canada)

时间:4月16日(周四)下午5:30

地点:光电研究所二层报告厅

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报告题目:Beyond quantum noise limit

报告人:Heng Shen(Niels Bohr Institute, University of Copenhagen)

时间:2015.4.10(周五)下午5:00

地点:光电所二层报告厅

摘要:

I will talk about different experiments on spin squeezing and entanglement involving room temperature ensembles of Cesium atoms. The key method is the off-resonant Faraday interaction of spin-polarized atomic ensemble with a light field. And the key component is the micro-fabricated vapor cell coupled into an optical cavity. Quantum backaction evading measurement of one quadrature of collective spin components by stroboscopically modulating the intensity of probe beam at twice Larmor frequency is used to generate the spin-squeezed state. A projection noise limited optical magnetometer at room temperature is reported. Furthermore, using spin-squeezing of atomic ensemble, the sensitivity of magnetometer is improved. Deterministic continuous variable teleportation between two distant atomic ensembles is demonstrated. The fidelity of teleportating dynamically changing sequence of spin states surpasses a classical benchmark, demonstrating the true quantum teleportation.

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报告题目:激光冷却极性分子

报告人:颜波(JILA, University of Colorado and National Institute of Standards and Technology, Boulder,  USA)

时间2015年1月21日(周三)下午5:00

地点光电研究所二层报告厅 

摘要:正像冷原子技术深刻地改变了原子物理研究一样,分子冷却后也有许多科学应用,例如精密测量,多体问题等等。但是现有的分子冷却方案只能将分子冷却到mK量级,另一方面,间接冷却方法能获得超冷分子,但受限于能冷却的原子种类。人们希望能直接将分子冷却到超冷温度,最近新发展起来的激光冷却分子方案,利用某些分子能级准闭合的特点,让分子散射足够多的光子,有望实现这一目标。我将报告激光冷却YO分子的最新研究进展,利用微波方案将不同的转动能级混合起来,我们观察到激光减速YO分子,此方案大大拓展了激光冷却分子的类型。

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报告题目:Manipulation and measurement of single atoms in Cavity QED system

报告人: 杜金锦

时间:2014.4.12上午10:00

地点:光电所二层报告厅

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报告题目:非线性损耗在单频激光器中的作用

报告人: 卢华东

时间:2013.6.22上午10:00

地点:光电所三层报告厅

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报告题目:多模非经典态的产生及量子测量

报告人:刘奎

时间:2013.6.15上午10:00

地点:光电所三层报告厅

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报告题目:A quantum effect in the classical limit: nonequilibrium tunneling in the Duffing model for qubit readout

报告人:Alec Maassen van den Brink (Research Center for Applied Sciences Academia Sinica, Taipei, Taiwan)

时间:2013.6.4下午5:00
地点:光电所三层报告厅

Abstract:The Duffing model is an oscillator with weak near-resonant driving, damping, and nonlinearity, which has often been studied in classical mechanics. For certain parameters, the stationary amplitude and phase bifurcate depending on initial conditions, and vary widely from one stable branch to the other. Due to this sensitivity, the system can be used for detection devices.

In recent years, a superconducting implementation—the so-called Josephson bifurcation amplifier (JBA)--has been successfully used experimentally for superconducting qubit readout. In the experimental literature, the JBA is often taken as classical. However, for e.g. understanding how the stability of the stationary states is modified by tunneling, a proper quantum analysis is necessary. Such tunneling transitions would be an error process from the point of view of detector applications. One thus has to study dissipative tunneling not between two potential wells, but between the limit cycles of a nonlinear dynamical system. Our numerical data, supported by semi-analytical asymptotic work, confirm the basic picture of dynamical tunneling. In addition, the results point at some intriguing aspects particular to the nonequilibrium setting, including noncommuting classical and low-temperature limits.

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报告题目:The generation of pulsed squeezed light

报告人:刘洪雨

时间:2013.5.25(周六)上午10:00
地点:光电所三层报告厅

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报告题目:热原子系综的大失谐Raman存储(Far-off-resonance Raman memory wtih hot atomic ensemble)

报告人:梁强兵

报告时间:2013.5.18(周六)上午10:00
报告地点:光电所三层报告厅

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报告题目1) Fulde-Ferrell pairing states in a Fermi gas with anisotropic spin-orbit coupling and Zeeman fields
报告人:易为 (中国科学技术大学)

摘要:
We study the phase diagram of a two-dimensional ultracold Fermi gas with the synthetic spin-orbit coupling (SOC) that has recently been realized at NIST. Due to the coexistence of anisotropic SOC and effective Zeeman fields in the NIST scheme, the system shows rich structure of phase separation involving exotic gapless superfluid and Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) pairing states with different center-of-mass momentum. In particular, we characterize the stability region of FFLO states and demonstrate their unique features under SOC. We then show that the effective transverse Zeeman field in the NIST scheme can qualitatively change the landscape of the thermodynamic potential which leads to intriguing effects such as the disappearance of pairing instability, the competition between different FFLO states, and the stabilization of a fully gapped FFLO state. Finally, we discuss the general pairing physics under SOC and Fermi surface asymmetry.

 

报告题目2) 具有Rashba类型自旋轨道耦合的二维费米气体
报告人:张威(中国人民大学)
摘要:
在本次报告中,我们将聚焦具有Rashba类型自旋轨道耦合的二维费米气体中的两体问题和多体问题。通过求解该系统中的两体散射强度和两体束缚态,我们验证了传统的重整化关系在该体系中依然适用,且自旋轨道耦合会提高两体束缚能。同时,我们还系统刻画了该体系的相图,确定了非平庸拓扑超流相的存在区间。在大极化极限下,我们通过变分波函数,发现了体系中可能存在极化子-分子转变。最后,将这些讨论推广到准二维,我们发现由于自旋轨道耦合的存在,z方向自由度在共振点甚至BCS区域都是不可忽略。为刻画这些自由度的影响,我们提出了一个等效低能模型,并研究了这一模型和纯二维模型的区别。

 

报告时间:2013.5.11(周六)上午10:00
报告地点:光电所三层报告厅

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报告人:李瑛(日本 国家信息通讯研究院主任研究员)

报告题目:日本国家信息通讯研究院的光频标研究进展

报告时间:2013年5月4日(周六)上午10:00

报告地点:光电所三层会议室

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报告题目:Theoretical and Experimental Investigations of the LD pumped Er,Yb:YAB Laser
报告人: 李渊骥
时间:2013.04.20(周六)上午10:00
地点:光电所三层报告厅

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报告题目:Quantum Simulation with Atoms in Optical Lattices
报告人: Randall G. Hulet
Rice University, Department of Physics and Astronomy, Houston, TX
http://atomcool.rice.edu/
时间:2013.04.16 (星期二) 下午4:30
地点:光电所三层报告厅

Abstract:

Some of the most complex and vexing issues in electronic materials are modeled by extremely simple Hamiltonians. High-temperature superconductors, for example, may arise from magnetic interactions in a Mott insulating state, described by the simple Hubbard model. The Hubbard model stipulates that particles (electrons in the case of superconductors) are distributed in a square lattice where they can hop from site to site with a tunneling energy t, and where they may interact with occupied nearest neighbor sites with interaction energy U. No one knows whether this simple “hydrogen-atom” model actually gives rise to the d-wave pairing underlying the cuprate superconductors.
I will describe two experiments that use ultracold atoms in an optical lattice as stand-ins for the electrons in ionic lattices: 1) the Hubbard model in 3D; and 2) the polarized spin-½ Fermi gas in 1D. In the first experiment, we are searching for the anti-ferromagnetic Mott insulating state that is expected to exist above the superconducting transition when there is exactly one-atom per lattice site. We have used Bragg scattering of near-resonant light to characterize the lattice, and will use a spin-sensitive variant of this tool to detect magnetic correlations. In the second experiment, we have used an optical lattice in two-dimensions to create a bundle of 1D tubes containing an imbalanced two spin-state mixture of 6Li fermions. The phase diagram of this system contains three phases: a fully-paired superfluid, a fully-polarized ferromagnet, and a partially polarized state that is predicted to be the exotic FFLO superfluid state, for which the pairs have non-zero center of mass momentum.

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报告题目:Quantum-Enhanced metrology----------Optical interferometry
报告人: 李文芳
时间:2013.04.13 上午10:00
地点:光电所三层报告厅

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报告题目:Polarization Photonic State Memory
报告人:武跃龙
时间:2013.03.30 上午10:00
地点:光电所三层报告厅

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报告题目:The generation of 795 nm laser by frequency-doubling of the singly resonant optical parametric oscillator
报告人:李鹏
时间:2013.03.23 上午10:00
地点:光电所三层报告厅

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报告题目:全固态单频461nm钛宝石激光器的研究进展
报告人:李凤琴
报告时间:2013年3月16日(星期六)上午10:00
报告地点:光电所三层报告厅

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报告题目:Simultaneous fast and slow light effects based on degenerated FWM

报告人:姜其畅

指导老师:张俊香教授

报告时间:2013-3-1上午10点

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报告题目:Symmetry protected topological orders in interacting bosonic systems

报告人:陈谐
美国加州大学伯克利分校
Research Fellow
报告时间:2013年1月26日 下午3点

地点:光电所三层报告厅

摘要:The discovery of topologically ordered systems, like quantum hall and topological insulators, have greatly extended our knowledge of quantum many-body physics and it is highly desirable to know what topological orders exist in general. While in free fermion systems topological phases have been well characterized and even classified, it is unclear what happens when interaction between particles is taken into account. Are the topological features stable with interaction? Are there new topological phases in strongly interacting systems? In this talk, I will try to answer these questions for the subclass of 'symmetry protected topological(SPT) order' phases which are separated from a trivial phase only under symmetry constraint, for example a time reversal invariant topological insulator. I will show that by studying the universal many-body entanglement structures in the ground states of such phases, we can completely classify all SPT orders in 1D gapped systems and systematically construct new SPT models in two and higher dimensions and prove their stability even under strong interactions. Our approach of focusing on the entanglement structure of ground states allows us to treat any interaction on the same footing. Moreover, it is tightly connected to quantum information ideas and allows interesting interactions between the two fields.

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报告题目:连续变量多组份纠缠态光场制备的研究进展

报告人贾晓军

报告时间:2013年1月19日 上午10点

地点:光电所三层报告厅

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报告题目:构建基于FPGA技术的测控系统
报告人:历炜 NI工程师
报告时间:8:30 2013.1.16
报告地点:山西大学光电研究所三层报告厅

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报告题目:部分相干光束的调控、传输及应用基础研究

报告人:蔡阳健 教授

(苏州大学物理科学与技术学院特聘教授,全国百篇优秀博士论文获得者)

报告时间:2013年1月12日(星期六) 上午 10:00

报告地点:山西大学光电研究所三层报告厅

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报告题目:Momentum-resolved Raman spectroscopy of bound molecules in ultracold Fermi gas

报告人:黄良辉

报告时间:2013年1月5日 上午10点

地点:光电所三层报告厅

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报告题目:Nano-photonics towards QIT with diamond and NV centers:
Fabrication and Detection
报告人:孙方稳 副教授
(中国科学技术大学需理学院, 中科院量子信息重点实验室)
地点:山西大学光电研究所三层报告厅
时间:2012年12月22日上午10点

Abstract:In this talk, I will present our recent research results on
diamond and Nitrogen-Vacancy (NV) centers.
We fabricate NV centers in diamond with nitrogen ions implantation. On this
sample, we develop a quantum
imaging method to distinguish two nearby NV centers without the restriction
of diffraction limit. Also, low
temperature measurement on NV centers shows that optical and electronic
transition energies tend to be
constant for temperature below 100 K, which indicates higher stability and
performance for quantum information
techniques and high resolution detection of electronic and magnetic field.
At the end, I will give a brief introduction
to our research on surface Plasmon for nano-photonic device.

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报告题目:具有自旋-轨道耦合的超冷原子之间的散射

报告人:张芃 ( (中国人民大学物理系)

报告时间:2012年12月15日 上午10点

地点:光电所三层报告厅

内容摘要:我们系统研究了具有自旋-轨道耦合超冷原子之间的散射问题。从第一性原理出发,我们发现当存在自旋轨道耦合的时候,原子之间的Bethe-Peierles边界条件需要修正。我们得出了修正的Bethe-Peierles边界条件,并以此为基础得出了原子之间低能散射振幅的解析表达式,以及求解低能束缚态的有效方法。应用我们的方法,我们与中科大实验小组合作,研究了存在自旋轨道耦合的系统中亚稳态原子的衰败问题。我们还讨论了准二维气体中存在自旋轨道耦合时候原子之间的散射振幅,束缚态能量和有效相互作用。

参考文献

[1] Peng Zhang, Long Zhang and Wei Zhang, Phys. Rev. A 86, 042707 (2012).

[2] Peng Zhang, Long Zhang, Youjin Deng, Phys. Rev. A 86, 053608 (2012).

[3] Long Zhang, Jin-Yi Zhang, Si-Cong Ji, Zhi-Dong Du, Hui Zhai, Youjin Deng, Shuai Chen, Peng Zhang, Jian-Wei Pan, arXiv:1208.4941.
[4] Long Zhang, Peng Zhang and Youjin Deng, arXiv:1211.6919

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报告题目:Preparation a single atom in an optical micro-traptowards the scalable implementation of multi-qubit

报告人:何军

报告时间:2012128 上午10

地点:光电所三层报告厅

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题目:Francium Spectroscopy Experiment at TRIUMF

报告人:张颉颃

报告时间:2012123 上午11

地点:光电所三层报告厅

2009年毕业于中国科学技术大学物理系,

现在在美国马里兰大学物理系及联合量子所(Joint Quantum Institute, JQI)攻读博士学位。

JQI是由诺贝尔物理学奖得主William Philips倡导,由美国国家标准局和马里兰大学联办的量子中心。在量子信息,冷原子物理,量子光学等领域都有出色的研究。

201110月至201211月,张颉颃在加拿大TRIUMF工作。TRIUMF是加拿大的核物理与粒子物理国家实验室,拥有世界上最大的质子回旋加速器,提供没有稳定同位素的放射性元素:钫。

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报告题目:Experimental preparation of eight-partite linear and two-diamond shape cluster states

报告人:郝树宏

报告时间:20121201日 上午10

地点:光电所三层报告厅

 

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