论文标题
在弱和强耦合方面，量子zeno和反向效应具有驱动场的效果
The quantum Zeno and anti-Zeno effects with driving fields in the weak and strong coupling regimes
论文作者
论文摘要
量子力学中的重复测量可以冻结（量子zeno效应）或增强量子系统的时间进化（量子抗Zeno效应）。在本文中，我们介绍了对任意驱动的开放量子系统的量子Zeno和抗Zeno效应的一般处理，只是假设系统 - 环境耦合较弱。特别是，我们获得了受任意驾驶场和定期测量的两级系统的有效衰减率的一般表达。我们证明了驱动场会改变衰减速率，因此在定性和定量上都改变了量子Zeno和反式行为。我们还将结果扩展到了由多个两级系统组成的系统，以及与谐波振荡器环境强烈耦合的两级系统，以进一步说明驱动场对量子Zeno和反Zeno效应的非整体效应。
Repeated measurements in quantum mechanics can freeze (the quantum Zeno effect) or enhance (the quantum anti-Zeno effect) the time-evolution of a quantum system. In this paper, we present a general treatment of the quantum Zeno and anti-Zeno effects for arbitrary driven open quantum systems, assuming only that the system-environment coupling is weak. In particular, we obtain a general expression for the effective decay rate of a two-level system subjected to arbitrary driving fields as well as periodic measurements. We demonstrate that the driving fields change the decay rate, and hence the quantum Zeno and anti-Zeno behavior, both qualitatively and quantitatively. We also extend our results to systems consisting of more than one two-level system, as well as a two-level system strongly coupled to an environment of harmonic oscillators, to further illustrate the non-trivial effect of the driving fields on the quantum Zeno and anti-Zeno effects.
