Quantum feedback for rapid state preparation in the presence of control imperfections
Centre for Quantum Computation and Communication Technology (Australian Research Council), Centre for Quantum Dynamics, Griffith University（昆士兰大学量子计算与通信技术中心（澳大利亚研究委员会），量子动力学中心，格里菲斯大学）
Joshua Combes, Howard M. Wiseman
备注：
15 pages, 6 figures and 2 tables. V2 the published version, fig. 1 corrected and some minor changes to the text
Quantum feedback control protocols can improve the operation of quantum devices. Here we examine the performance of a purification protocol when there are imperfections in the controls. The ideal feedback protocol produces an $x$ eigenstate from a mixed state in the minimum time, and is known as rapid state preparation. The imperfections we examine include time delays in the feedback loop, finite strength feedback, calibration errors, and inefficient detection. We analyse these imperfections using the Wiseman-Milburn feedback master equation and related formalism. We find that the protocol is most sensitive to time delays in the feedback loop. For systems with slow dynamics, however, our analysis suggests that inefficient detection would be the bigger problem. We also show how system imperfections, such as dephasing and damping, can be included in model via the feedback master equation.
Robust quantum key distribution with imperfections in state preparation and characterization
Henan Key Laboratory of Quantum Information and Cryptography, IEU（IEU量子信息与密码学河南省重点实验室）；State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Key Lab of Navigation and Location Services, Department of Electronic Engineering, Shanghai Jiao Tong University（上海交通大学电子工程系先进光通信系统与网络国家重点实验室上海导航与定位服务重点实验室）
Finite-key security analysis of decoy-state QKD with source and detector imperfections
University of Vigo（维戈大学）；Vigo Quantum Communication Center, University of Vigo（维戈量子通信中心，维戈大学）；Escuela de Ingeniería de Telecomunicación, Department of Signal Theory and Communications, University of Vigo（电信工程学院，信号理论与通信系，维戈大学）；atlanTTic Research Center, University of Vigo（atlanTTic研究中心，维戈大学）
Experimental Measurement-Device-Independent Quantum Key distribution with Flawed State-Preparation over 300 km
Henan Key Laboratory of Quantum Information and Cryptography, IEU（量子信息与密码学河南省重点实验室，IEU）；State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Key Lab of Navigation and Location Services, Department of Electronic Engineering, Shanghai Jiao Tong University（先进光通信系统与国家网络国家重点实验室，导航与位置服务上海市重点实验室，电子工程系，上海交通大学）
Simplified quantum key distribution implementation secure in the presence of state preparation flaws
Vigo Quantum Communication Center, University of Vigo（维戈量子通信中心，维戈大学）；Escuela de Ingeniería de Telecomunicación, Department of Signal Theory and Communications, University of Vigo（电信工程学院，信号理论与通信系，维戈大学）；AtlanTTic Research Center, University of Vigo（AtlanTTic研究中心，维戈大学）；Department of Applied Physics, University of Geneva（应用物理系，日内瓦大学）
Quantum Process Estimation via Generic Two-Body Correlations
量子过程估计的性能自然限于制备和测量中的基本、随机和系统缺陷。由于标准数据分析技术假定理想器件的事实，这些缺陷可能导致过程重构中的相当大的误差。在这里，通过利用通用的辅助量子或经典相关性，我们提供了一个框架，通过一个单一的测量设备的量子动力学的估计。通过构造，该方法可以应用于具有校准的故障状态生成器和分析器的量子层析成像方案。具体地说，我们给出了“量子动力学的直接刻画”[M。Mohseni和D. A. Lidar，Phys. Rev. Lett. 97，170501（2006）]与不完美的贝尔状态分析器。我们证明，对于几个物理相关的噪声准备和测量，只有经典的相关性和小的数据处理开销足以完成完整的系统识别。此外，我们提供了最佳的输入状态，由于测量数据的反演误差放大是最小的。
Adiabatic echo protocols for robust quantum many-body state preparation
University of Innsbruck（因斯布鲁克大学）；Austrian Academy of Sciences（奥地利科学院）；JILA, University of Colorado and National Institute of Standards and Technology（科罗拉多大学与美国国家标准与技术研究院联合物理科学研究所）；Department of Physics, University of Colorado（科罗拉多大学物理系）
Rapid quantum ground state preparation via dissipative dynamics
Institute for Quantum Information and Matter, California Institute of Technology（加州理工学院量子信息与物质研究所）；Division of Physics, Mathematics, and Astronomy, California Institute of Technology（加州理工学院物理、数学与天文学部）；Department of Mathematics, University of California, Berkeley（加州大学伯克利分校数学系）；Department of Physics and Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München（慕尼黑大学物理系及阿诺德·索末菲理论物理中心）；AWS Center for Quantum Computing（亚马逊云科技量子计算中心）；Applied Mathematics and Computational Research Division, Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室应用数学与计算研究部）
Side-channel-secure quantum key distribution with correlated sources
University of Science and Technology of China（中国科学技术大学）；Laboratory of Quantum Information, University of Science and Technology of China（中国科学技术大学量子信息实验室）；Anhui Province Key Laboratory of Quantum Network, University of Science and Technology of China（中国科学技术大学安徽省量子网络重点实验室）；CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China（中国科学技术大学中国科学院量子信息与量子物理前沿卓越中心）
Benchmark of quantum algorithms for ground state preparation in the presence of noise
Munich Center for Quantum Science and Technology (MCQST)（慕尼黑量子科学与技术中心）；Technical University of Munich, TUM School of Natural Sciences, Physics Department（慕尼黑工业大学）；Max-Planck-Institut für Quantenoptik（马克斯·普朗克量子光学研究所）
Fast and robust cat state preparation utilizing higher order nonlinearities in Rydberg ensembles
Karlsruhe Institute of Technology（卡尔斯鲁厄理工学院）；Freie Universität Berlin（柏林自由大学）；CESQ/ISIS (UMR 7006), CNRS and University of Strasbourg（CNRS与斯特拉斯堡大学 CESQ/ISIS (UMR 7006)）；Nordita, KTH Royal Institute of Technology and Stockholm University（诺尔迪塔，皇家理工学院与斯德哥尔摩大学）；Department of Physics, Stockholm University（斯德哥尔摩大学物理系）；Institute for Theory of Condensed Matter, Karlsruhe Institute of Technology（卡尔斯鲁厄理工学院凝聚态理论研究所）
Geodesic steering for rapid dissipative entanglement distribution
Technical University of Munich（慕尼黑工业大学）；Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften（瓦尔特·迈斯纳研究所，巴伐利亚科学院）；Munich Center for Quantum Science and Technology (MCQST)（慕尼黑量子科学与技术中心）
