两比特开放量子系统中跨异常点(Exceptional Point)的纠缠生成——初始态的作用
量子物理
2025-08-25 v1
摘要
我们研究了一个由通过置换相互作用耦合的两比特构成的开放量子系统。将比特之间的耦合强度作为时间尺度,该系统的 Liouvillian 在两个比特衰减率差异上具有取决于异常点。我们发现,初始态的配置在决定演化初始阶段纠缠动力学特征方面起着重要作用。 Depending on whether or not the initial excitations of the qubits can be swapped by the interaction that couples them,the change in total decay rate can be either consistently unfavorable to entanglement generation,or shift the dynamics from hindering to enhancing entanglement generation,or vice versa,as the system traverses the exceptional points。这种位移也可能在广泛的混合态中发生。我们阐明了本文中该行为的来源。
引用
@article{arxiv.2508.16101,
title = {Entanglement generation across exceptional points in two-qubit open quantum system -- the role of initial states},
author = {B. A. Tay and Yee Shean H'ng},
journal= {arXiv preprint arXiv:2508.16101},
year = {2025}
}
备注
To appear in Phys. Rev. E