Strasberg Philipp, Schaller Gernot, Brandes Tobias, Esposito Massimiliano
Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany.
Complex Systems and Statistical Mechanics, University of Luxembourg, L-1511 Luxembourg, Luxembourg.
Phys Rev Lett. 2013 Jan 25;110(4):040601. doi: 10.1103/PhysRevLett.110.040601. Epub 2013 Jan 24.
We present a physical implementation of a Maxwell demon which consists of a conventional single electron transistor (SET) capacitively coupled to another quantum dot detecting its state. Altogether, the system is described by stochastic thermodynamics. We identify the regime where the energetics of the SET is not affected by the detection, but where its coarse-grained entropy production is shown to contain a new contribution compared to the isolated SET. This additional contribution can be identified as the information flow generated by the "Maxwell demon" feedback in an idealized limit.
我们展示了一种麦克斯韦妖的物理实现，它由一个传统的单电子晶体管（SET）组成，该晶体管通过电容耦合到另一个用于检测其状态的量子点。总体而言，该系统由随机热力学描述。我们确定了这样一种情况，即SET的能量学不受检测影响，但其粗粒熵产生与孤立的SET相比显示出一种新的贡献。这种额外的贡献可以在理想化极限中被识别为由“麦克斯韦妖”反馈产生的信息流。
