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arXiv 1808.09593quant-phnlin.CD
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量子测量选择放大涨落能标对量子混沌系统的影响:半经典分析

The effects of amplification of fluctuation energy scale by quantum measurement choice on quantum chaotic systems: Semiclassical analysis

S. Greenfield, Y. Shi, J. K. Eastman, A. R. R. Carvalho, A. K. Pattanayak

摘要:

弱测量开放量子系统中的测量选择会影响量子轨道混沌。我们认为这种情况下半经典的,并表明,测量作为非线性广义波动和耗散力。这些可以改变量子扩展变量中的有效耗散,并因此改变动力学,使得对耦合量子动力学的测量选择可以增强量子效应,并使动力学混乱。这种分析解释了在各种参数设置的量子混沌的测量依赖性,特别是我们证明了定量的监测方案的选择可以更相关的比系统规模$β$在确定系统的“quantumness”。

英文摘要:

Measurement choices in weakly-measured open quantum systems can affect quantum trajectory chaos. We consider this scenario semi-classically and show that measurement acts as nonlinear generalized fluctuation and dissipation forces. These can alter effective dissipation in the quantum spread variables and hence change the dynamics, such that measurement choices on the coupled quantum dynamics can enhance quantum effects and make the dynamics chaotic, for example. This analysis explains the measurement-dependence of quantum chaos at a variety of parameter settings, and in particular we demonstrate quantitatively that the choice of monitoring scheme can be more relevant than system scale $β$ in determining the `quantumness' of the system.

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