Environment-assisted quantum transport and mobility edges
Environment-assisted quantum transport and mobility edges
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DOI：
10.1103/physreva.104.022205
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发表时间：
2021-08-12
影响因子：
2.9
通讯作者：
Zen, Freddy P.
中科院分区：
文献类型：
--
作者：
Dwiputra, Donny;Zen, Freddy P.
环境辅助量子输运（ENAQT）是一种独特的情况，在这种情况下，环境噪声可以增强开放量子系统的输运。在本文中，我们研究了一维单粒子迁移边缘的存在如何产生强ENAQT。为此，我们研究了一个广义Aubry-Andre-Harper紧密结合模型的能量流，该模型在其边缘处耦合到系统中不同温度和消相噪声的自旋槽。我们发现ENAQT呈数量级增长，并非单调地依赖于局域特征态数和无序强度。研究表明，这种增强是种群均一化和局部化共同作用的结果。
Environment-assisted quantum transport (ENAQT) is a unique situation where environmental noise can, counterintuitively, enhance the transport of an open quantum system. In this paper, we investigate how the presence of a one-dimensional single-particle mobility edge can generate strong ENAQT. For this purpose, we study the energy current of a generalized Aubry-Andre-Harper tight binding model coupled at its edges to spin baths of differing temperature and dephasing noise along the system. We find that the ENAQT increases by orders of magnitude and depends on the number of localized eigenstates and disorder strength nonmonotonically. We show that this enhancement is the result of the cooperation between population uniformization and localization.