库仑耦合量子点中的反向电流
Inverse currents in Coulomb-coupled quantum dots
摘要：
反向电流，即，感应电流与外力方向相反，最近在经典的一维相互作用哈密顿系统中被发现。124，110607（2020）]。本文证明了在量子系统中也存在反向电流。基于库仑耦合量子点系统，我们发现当库仑相互作用增大时，会出现反向电流。这并不违反热力学第二定律，因为由反向电流引起的熵减少被由正向电流引起的熵增加补偿，这确保系统的总熵增加总是大于零。
英文摘要：
The inverse current, i.e., induced current is opposite to applied force, has recentlybeen found in a classical one-dimensional interacting Hamiltonian system [Phys. Rev.Lett. 124, 110607 (2020)]. In this paper, we show that inverse current also exists in quantum system. Based on Coulomb-coupled quantum dots system, we find that inverse current will appear when Coulomb interaction increases. This does not violate the second law of thermodynamics, since entropy reduction caused by inverse current is compensated by entropy increase caused by forward current, which ensure that total entropy increase of the system is always greater than zero.
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