Schaller Gernot, Ablaßmayer Julian
Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany.
Entropy (Basel). 2020 May 5;22(5):525. doi: 10.3390/e22050525.
We study the coarse-graining approach to derive a generator for the evolution of an open quantum system over a finite time interval. The approach does not require a secular approximation but nevertheless generally leads to a Lindblad-Gorini-Kossakowski-Sudarshan generator. By combining the formalism with full counting statistics, we can demonstrate a consistent thermodynamic framework, once the switching work required for the coupling and decoupling with the reservoir is included. Particularly, we can write the second law in standard form, with the only difference that heat currents must be defined with respect to the reservoir. We exemplify our findings with simple but pedagogical examples.
我们研究了粗粒化方法，以推导开放量子系统在有限时间间隔内演化的生成器。该方法不需要久期近似，但通常会得到一个林德布拉德-戈里尼-科萨克夫斯基-苏达山生成器。通过将该形式体系与全计数统计相结合，一旦包含了与储能器耦合和解耦所需的开关功，我们就能证明一个一致的热力学框架。特别地，我们可以将第二定律写成标准形式，唯一的区别是热流必须相对于储能器来定义。我们用简单但具有启发性的例子来说明我们的发现。
