arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.12072quant-ph
收藏

非马尔可夫量子跳跃的扩散极限

Diffusive limit of non-Markovian quantum jumps

Kimmo Luoma, Walter T. Strunz, Jyrki Piilo

摘要:

解决了开放量子系统动力学随机描述的两个长期存在的问题。首先,我们在射影希尔伯特空间中找到了对应于非马尔可夫量子态扩散和非马尔可夫量子跳跃的经典随机过程。其次,我们证明了非马尔可夫量子跳跃的扩散极限可以在投影希尔伯特空间上取,使得它与非马尔可夫量子态扩散一致。然而,在希尔伯特空间上采取的同样的限制导致了一种全新的扩散解开,我们称之为非马尔可夫量子扩散。此外,我们扩大了非马尔可夫量子跳跃和非马尔可夫量子扩散的适用性,通过使用核平滑技术,允许显着简化其使用。最后,我们用这三种方法研究了一个非马尔可夫体系中的受驱动耗散二能级原子,证明了我们的结果的适用性。

英文摘要:

We solve two long standing problems for stochastic descriptions of open quantum system dynamics. First, we find the classical stochastic processes corresponding to non-Markovian quantum state diffusion and non-Markovian quantum jumps in projective Hilbert space. Second, we show that the diffusive limit of non-Markovian quantum jumps can be taken on the projective Hilbert space in such a way that it coincides with non-Markovian quantum state diffusion. However, the very same limit taken on the Hilbert space leads to a completely new diffusive unraveling, which we call non-Markovian quantum diffusion. Further, we expand the applicability of non-Markovian quantum jumps and non-Markovian quantum diffusion by using a kernel smoothing technique allowing a significant simplification in their use. Lastly, we demonstrate the applicability of our results by studying a driven dissipative two level atom in a non-Markovian regime using all of the three methods.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑