We analyze the dephasing dynamics of an impurity coupled to an anharmonic environment. We show that a strong anharmonicity produces two different effects depending on the environment temperature: for high temperatures, the system suffers a strong dephasing, while for low temperatures there is a strong information back-flow (as measured by the Breuer-Laine-Piilo (BLP) non-Markovianity measure). Both dephasing and back-flow are particularly significant when the anharmonic potential allows environment states very close to the dissociation limit. In contrast, the information back-flow is suppressed when assuming the environment to be Gaussian. In this regard, we find that the Gaussian approximation is particularly poor at low temperatures.
从开放量子系统的角度研究了零温下二维玻色-哈伯德模型中二能级杂质的动力学行为。给出了整个相图中的退相干结果，重点讨论了超流与莫特绝缘体之间的临界区域。特别是，我们展示了如何退相干和偏离马尔可夫行为是敏感的过渡是否在相称或不相称的密度。的玻色-哈伯德环境的光谱和它的非高斯统计的作用，超出了标准的独立玻色子模型，突出。我们的分析采用了最近开发的方法[Phys. Rev. Research 2，033276（2020）] -与从属玻色子方法密切相关-使我们能够捕获整个相图中的相关性。这种半解析方法为我们提供了一个深入了解的物理自旋退相干在超流和莫特阶段，以及接近相变。
Correlated decoherence and thermometry with mobile impurities in a 1D Fermi gas
School of Physics, Trinity College Dublin（都柏林三一学院物理学院）；Quantum Systems Unit, OIST Graduate University（冲绳科学技术大学院大学量子系统单元）；Department of Physics, King’s College London（伦敦国王学院物理系）
Competition of light- and phonon-dressing in microwave-dressed Bose polarons
Institute of Science and Technology Austria (ISTA)（奥地利科学技术研究所）；Department of Physics, Missouri University of Science and Technology（密苏里科技大学物理系）；Department of Physics and Arnold Sommerfeld Center for Theoretical Physics (ASC), Ludwig-Maximilians-Universitat München（慕尼黑大学物理系及阿诺德·索末菲理论物理中心）；Munich Center for Quantum Science and Technology (MCQST)（慕尼黑量子科学与技术中心）；ITAMP, Harvard-Smithsonian Center for Astrophysics（哈佛-史密森天体物理中心）；Center for Optical Quantum Technologies, Department of Physics, University of Hamburg（汉堡大学光学量子技术中心物理系）；The Hamburg Centre for Ultrafast Imaging, University of Hamburg（汉堡大学超快成像中心）
Environmental Control Extends Beyond Quantum Dephasing in Exciton Energy Transfer
Ningbo University（宁波大学）；SLAC National Accelerator Laboratory（斯坦福直线加速器中心）；Hangzhou Dianzi University（杭州电子科技大学）；University of Toronto（多伦多大学）；Rosalind Franklin Institute（罗莎琳德·富兰克林研究所）；University of Oxford（牛津大学）
QuTiP-BoFiN: A bosonic and fermionic numerical hierarchical-equations-of-motion library with applications in light-harvesting, quantum control, and single-molecule electronics
