自旋环境下初始系统环境相关性的作用

IF 2.6 4区 物理与天体物理 Q2 PHYSICS, APPLIED International Journal of Modern Physics B Pub Date : 2024-01-25 DOI:10.1142/s0217979224504290
Ali Raza Mirza, Mah Noor Jamil, Adam Zaman Chaudhry
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引用次数: 0

摘要

开放量子系统是一个备受关注的课题,因为了解这些系统对于实现现代量子技术至关重要。在其动力学研究中,初始系统-环境相关性的作用通常被忽视。在这项工作中,为了深入了解这些相关性的作用,我们求解了一个与自旋环境相互作用的单个两级系统的精确可解模型,其初始系统状态是由合适的单元操作准备的。通过精确求解任意系统-环境耦合强度下的动力学,同时考虑到初始系统-环境相关性,我们发现初始相关性的影响通常非常显著,而且并非微不足道。为了进一步强调初始系统-环境相关性的重要性,我们还将研究扩展到了与共同自旋环境相互作用的两个两级系统之间的纠缠动力学。
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The role of initial system–environment correlations with a spin environment

Open quantum systems are a subject of immense interest as their understanding is crucial in the implementation of modern quantum technologies. In the study of their dynamics, the role of the initial system–environment correlations is commonly ignored. In this work, to gain insights into the role of these correlations, we solve an exactly solvable model of a single two-level system interacting with a spin environment, with the initial system state prepared by a suitable unitary operation. By solving the dynamics exactly for arbitrary system–environment coupling strength while taking into account the initial system–environment correlations, we show that the effect of the initial correlations is, in general, very significant and nontrivial. To further highlight the importance of the initial system–environment correlations, we also extend our study to investigate the dynamics of the entanglement between two two-level systems interacting with a common spin environment.

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来源期刊
International Journal of Modern Physics B
International Journal of Modern Physics B 物理-物理:凝聚态物理
CiteScore
3.70
自引率
11.80%
发文量
417
审稿时长
3.1 months
期刊介绍: Launched in 1987, the International Journal of Modern Physics B covers the most important aspects and the latest developments in Condensed Matter Physics, Statistical Physics, as well as Atomic, Molecular and Optical Physics. A strong emphasis is placed on topics of current interest, such as cold atoms and molecules, new topological materials and phases, and novel low dimensional materials. One unique feature of this journal is its review section which contains articles with permanent research value besides the state-of-the-art research work in the relevant subject areas.
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