Kiselev Alexei D, Ali Ranim, Rybin Andrei V
Laboratory of Quantum Processes and Measurements, ITMO University, Kadetskaya Line 3b, 199034 Saint Petersburg, Russia.
Faculty of Photonics, ITMO University, Kronverksky Pr. 49, bldg. A, 197101 Saint Petersburg, Russia.
Entropy (Basel). 2021 Oct 27;23(11):1409. doi: 10.3390/e23111409.
In this paper, we consider the thermal bath Lindblad master equation to describe the quantum nonunitary dynamics of quantum states in a multi-mode bosonic system. For the two-mode bosonic system interacting with an environment, we analyse how both the coupling between the modes and the coupling with the environment characterised by the frequency and the relaxation rate vectors affect dynamics of the entanglement. We discuss how the revivals of entanglement can be induced by the dynamic coupling between the different modes. For the system, initially prepared in a two-mode squeezed state, we find the logarithmic negativity as defined by the magnitude and orientation of the frequency and the relaxation rate vectors. We show that, in the regime of finite-time disentanglement, reorientation of the relaxation rate vector may significantly increase the time of disentanglement.
在本文中，我们考虑热库林德布拉德主方程来描述多模玻色子系统中量子态的量子非幺正动力学。对于与环境相互作用的双模玻色子系统，我们分析了模式间耦合以及由频率和弛豫率矢量表征的与环境的耦合如何影响纠缠动力学。我们讨论了不同模式间的动态耦合如何诱导纠缠的复苏。对于初始制备为双模压缩态的系统，我们根据频率和弛豫率矢量的大小和方向确定了对数负性。我们表明，在有限时间解纠缠的情况下，弛豫率矢量的重新定向可能会显著增加解纠缠时间。
