论文标题
有效的哈密顿开放量子系统理论在强耦合下
Effective Hamiltonian theory of open quantum systems at strong coupling
论文作者
论文摘要
我们介绍了反应坐标二极管转换（RCPT）框架，用于生成有效的哈密顿模型，以在强耦合与周围环境时处理非平衡的开放量子系统。我们的方法基于哈密顿尔顿人的两个确切转变，然后是其受控的截断，最后以新的哈密顿式式的结尾，与环境的耦合较弱。这种新的有效的汉密尔顿人反映了最初的参数，除了它的参数是由系统浴耦合打扮的。 RCPT方法的力量和优雅在于它的一般性和数学简单性，从而使分析工作，从而深刻了解强系统浴耦合对开放量子系统现象的影响。这项工作中询问的示例包括纳米级量子热化，电荷和能量传输的规范模型，量子热力学机器的性能界限，例如吸收冰箱和热电发电机，以及许多体体散发自旋链的平衡和非平衡行为。
We present the reaction-coordinate polaron-transform (RCPT) framework for generating effective Hamiltonian models to treat nonequilibrium open quantum systems at strong coupling with their surroundings. Our approach, which is based on two exact transformations of the Hamiltonian followed by its controlled truncation, ends with a new Hamiltonian with a weakened coupling to the environment. This new effective Hamiltonian mirrors the initial one, except that its parameters are dressed by the system-bath couplings. The power and elegance of the RCPT approach lie in its generality and in its mathematical simplicity, allowing for analytic work and thus profound understanding of the impact of strong system-bath coupling effects on open quantum system phenomena. Examples interrogated in this work include canonical models for quantum thermalization, charge and energy transport at the nanoscale, performance bounds of quantum thermodynamical machines such as absorption refrigerators and thermoelectric generators, as well as the equilibrium and nonequilibrium behavior of many-body dissipative spin chains.
