Roy Arko, Eckardt André
Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, 01187 Dresden, Germany.
INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Trento, Italy.
Phys Rev E. 2020 Apr;101(4-1):042109. doi: 10.1103/PhysRevE.101.042109.
We propose the implementation of a quantum heat pump with ultracold atoms. It is based on two periodically driven coherently coupled quantum dots using ultracold atoms. Each dot possesses two relevant quantum states and is coupled to a fermionic reservoir. The working principle is based on energy-selective driving-induced resonant tunneling processes, where a particle that tunnels from one dot to the other either absorbs or emits the energy quantum ℏω associated with the driving frequency, depending on its energy. We characterize the device using Floquet theory and compare simple analytical estimates to numerical simulations based on the Floquet-Born-Markov formalism. In particular, we show that driving-induced heating is directly linked to the micromotion of the Floquet states of the system.
我们提出了一种基于超冷原子的量子热泵实施方案。它基于使用超冷原子的两个周期性驱动的相干耦合量子点。每个量子点具有两个相关的量子态，并耦合到一个费米子库。其工作原理基于能量选择性驱动诱导的共振隧穿过程，在此过程中，从一个量子点隧穿到另一个量子点的粒子，根据其能量，要么吸收要么发射与驱动频率相关的能量量子ℏω。我们使用弗洛凯理论对该装置进行表征，并将简单的解析估计与基于弗洛凯 - 玻恩 - 马尔可夫形式的数值模拟进行比较。特别地，我们表明驱动诱导的加热与系统弗洛凯态的微运动会直接相关。
