Floquet engineering to reactivate a dissipative quantum battery
Floquet engineering to reactivate a dissipative quantum battery
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Floquet 工程重新激活耗散量子电池
DOI：
10.1103/physreva.102.060201
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发表时间：
2020-12-18
影响因子：
2.9
通讯作者：
An, Jun-Hong
中科院分区：
文献类型：
--
作者：
Bai, Si-Yuan;An, Jun-Hong
作为一种接近原子大小的能量存储和转换设备，量子电池（QB）承诺使用量子资源增强充电功率和可提取工作。然而，普遍存在的退相干导致其循环充电-存储-放电过程变得失活，这被称为QB的老化。在这里，我们提出了一种机制，以克服老化的QB。结果发现，当两个Floquet束缚态（FBS）形成的准能谱的总系统组成的QB充电器设置和各自的环境中，QB的消相干被抑制。只要两个FBS的准能量是退化的，或者在两个FBS的存在下QB-充电器耦合是大的，暴露于耗散环境的QB就返回到其接近理想的循环阶段。我们的结果提供了一个有见地的指导，以实现QB在实践中使用Floquet工程。
As an energy storing and converting device near atomic size, a quantum battery (QB) promises enhanced charging power and extractable work using quantum resources. However, the ubiquitous decoherence causes its cyclic charging-storing-discharging process to become deactivated, which is called aging of the QB. Here, we propose a mechanism to overcome the aging of a QB. It is found that the decoherence of the QB is suppressed when two Floquet bound states (FBSs) are formed in the quasienergy spectrum of the total system consisting of the QB-charger setup and their respective environments. As long as either the quasienergies of the two FBSs are degenerate or the QB-charger coupling is large in the presence of two FBSs, the QB exposed to the dissipative environments returns to its near-ideal cyclic stage. Our result supplies an insightful guideline to realize the QB in practice using Floquet engineering.