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arXiv 1104.2106quant-phcond-mat.other
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库珀对盒与纳米机械谐振器相互作用的统计特性控制

Controlling Statistical Properties of a Cooper Pair Box Interacting with a Nanomechanical Resonator

C. Valverde, A. T. Avelar anda B. Baseia

摘要:

我们调查的量子熵,它的功率谱,和一个库珀对盒与纳米机械谐振器相互作用的激发反转,第一个最初准备在其激发态,第二个准备在“猫”状态。该方法使用Jaynes-Cummings模型与阻尼,不同的衰减率的库珀对盒和不同的失谐条件,包括时间相关的失谐。在熵方面,我们发现与时间相关的失谐量使纠缠变得更加稳定,与文献中的结果相比。相对于库珀对盒激发反转,而存在的失谐破坏其崩溃和复苏,它表明,一个方便的时间依赖性失谐恢复这样的事件在一个很好的方式。

英文摘要:

We investigate the quantum entropy, its power spectrum, and the excitation inversion of a Cooper pair box interacting with a nanomechanical resonator, the first initially prepared in its excited state, the second prepared in a "cat"-state. The method uses the Jaynes-Cummings model with damping, with different decay rates of the Cooper pair box and distinct detuning conditions, including time dependent detunings. Concerning the entropy, it is found that the time dependent detuning turns the entanglement more stable in comparison with previous results in literature. With respect to the Cooper pair box excitation inversion, while the presence of detuning destroys the its collapses and revivals, it is shown that with a convenient time dependent detuning one recovers such events in a nice way.

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。

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