非马尔可夫量子动力学中的拖延环境诱导超选择
Procrastinating einselection in non-Markovian quantum dynamics
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中文总结 AI 辅助
本研究推导了有限维开放系统中可观测对象的量子速度极限，揭示了非马尔可夫性通过两种机制加速可观测演化，并延迟指针基的涌现。
中文摘要 AI 辅助
在由开放系统和耗散量子动力学控制的过程中，环境诱导的超选择（即einselection）尤为基础，因为它描述了通过环境监测形成一组优选的指针态，并最终导致经典性的涌现。特别是在量子达尔文主义的背景下，einselection可以通过可观测对象向其指针值运动的视角来研究。为此，我们推导了有限维系统中由可微时间局域开放动力学控制的可观测对象的量子速度极限。我们识别了两种非马尔可夫性增强可观测速度的机制：由布居保持或复兴支持的直接耗散运动，以及通过恢复可用于相干运动的非对称性实现的间接增强。对于永久性einselection，这会因累积的负性而延迟指针基的涌现。
英文摘要
Among the processes governed by open-system and dissipative quantum dynamics, environment-induced superselection, or einselection, is particularly foundational, since it describes the formation of a preferred set of pointer states through environmental monitoring and ultimately the emergence of classicality. Especially in the context of Quantum Darwinism, einselection can be studied in terms of the motion of an observable towards its pointer value. To this end, we derive a quantum speed limit for observables for finite-dimensional systems governed by differentiable time-local open dynamics. We identify two mechanisms through which non-Markovianity can enhance observable speed: direct dissipative motion supported by population retention or revival, and indirect enhancement through restoration of the asymmetry available for coherent motion. For permanent einselection, this delays the emergence of the pointer basis due to accumulated negativity.
发表机构
- University of Maryland, Baltimore County（马里兰大学巴尔的摩分校）
- Quantum Science Institute, University of Maryland, Baltimore County（马里兰大学巴尔的摩分校量子科学研究所）
- Research Center for Quantum Physics, National Research and Innovation Agency（国家研究与创新局量子物理研究中心）
- School of Physical and Mathematical Sciences, Nanyang Technological University（南洋理工大学物理与数学科学学院）
- National Quantum Laboratory（国家量子实验室）
机构由 AI 辅助整理，请以论文原文为准。
