arXivDaily arXiv每日学术速递 周一至周五更新
arXiv quant-ph/0401171quant-ph
收藏

非马尔可夫开放量子系统的类跳跃解

Jump-like unravelings for non-Markovian open quantum systems

Jay Gambetta, T. Askerud, H. M. Wiseman

摘要:

开放量子系统的非马尔可夫演化可以被“解开”为由非马尔可夫随机(扩散)薛定谔方程产生的纯态轨道,如Diósi、Gisin和Strunz所介绍的。最近,我们已经表明,这样的方程可以推导出使用模态(隐变量)解释的量子力学。在本文中,我们推广这个理论来处理跳跃式解开。为了说明跳跃的行为,我们考虑一个简单的系统:一个经典驱动的(在拉比频率$Ω$)二能级原子线性耦合到三模光浴,与一个中心频率等于原子的频率,$ω_0$,和两个边带的频率$ω_0\pmΩ$。在大的$Ω$限制,我们观察到的跳跃行为是类似于在这个系统中观察到的马尔可夫(宽带)浴。这是预期的,因为在马尔可夫极限下,强烈驱动的二能级原子的荧光光谱采取Mollow三重态的形式。然而,类马尔可夫行为持续的时间长度取决于{ \em哪一个}使用跳跃式解开。

英文摘要:

Non-Markovian evolution of an open quantum system can be `unraveled' into pure state trajectories generated by a non-Markovian stochastic (diffusive) Schrödinger equation, as introduced by Diósi, Gisin, and Strunz. Recently we have shown that such equations can be derived using the modal (hidden variable) interpretation of quantum mechanics. In this paper we generalize this theory to treat jump-like unravelings. To illustrate the jump-like behavior we consider a simple system: A classically driven (at Rabi frequency $Ω$) two-level atom coupled linearly to a three mode optical bath, with a central frequency equal to the frequency of the atom, $ω_0$, and the two side bands have frequencies $ω_0\pmΩ$. In the large $Ω$ limit we observed that the jump-like behavior is similar to that observed in this system with a Markovian (broad band) bath. This is expected as in the Markovian limit the fluorescence spectrum for a strongly driven two level atom takes the form of a Mollow triplet. However the length of time for which the Markovian-like behaviour persists depends upon {\em which} jump-like unraveling is used.

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。

↑