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Nonadiabatic Coherent Evolution Of Two-level Systems Under Spontaneous Decay

机译:自发衰减下两层系统的非绝热相干演化

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摘要

In this Letter we extend current perspectives in engineering reservoirs by producing a time-dependent master equation leading to a nonstationary superposition equilibrium state that can be nonadiabatically controlled by the system-reservoir parameters. Working with an ion trapped inside a nonideal cavity, we first engineer effective interactions, which allow us to achieve two classes of decoherence-free evolution of superpositions of the ground and excited ionic levels: those with a time-dependent azimuthal or polar angle. As an application, we generalize the purpose of an earlier study [Phys. Rev. Lett. 96, 150403 (2006)], showing how to observe the geometric phases acquired by the protected nonstationary states even under nonadiabatic evolution.
机译:在这封信中,我们通过产生一个时变的主方程来扩展工程储层中的当前观点,该主方程导致一个非平稳的叠加平衡状态,该状态可以由系统-储层参数非绝热地控制。首先,通过处理非理想腔内捕获的离子,我们设计出了有效的相互作用,这使我们能够实现两类无退相干的地面和激发离子能级叠加的演化:与时间相关的方位角或极角。作为应用,我们概括了早期研究的目的[Phys。牧师96,150403(2006)],显示了即使在非绝热演化过程中,如何观察受保护的非平稳状态所获得的几何相位。

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