Department of Physics and Mathematics, University of Hull, Hull HU6 7RX, UK.
Philos Trans A Math Phys Eng Sci. 2013 Aug 19;371(1999):20120468. doi: 10.1098/rsta.2012.0468. Print 2013 Sep 28.
Feedback control in quantum transport has been predicted to give rise to several interesting effects, among them quantum state stabilization and the realization of a mesoscopic Maxwell's daemon. These results were derived under the assumption that control operations on the system are affected instantaneously after the measurement of electronic jumps through it. In this contribution, I describe how to include a delay between detection and control operation in the master equation theory of feedback-controlled quantum transport. I investigate the consequences of delay for the state stabilization and Maxwell's daemon schemes. Furthermore, I describe how delay can be used as a tool to probe coherent oscillations of electrons within a transport system and how this formalism can be used to model finite detector bandwidth.
在量子输运中，反馈控制被预测会产生一些有趣的效果，其中包括量子态稳定和实现介观麦克斯韦妖。这些结果是在假设对系统的控制操作在电子通过它的跳跃测量之后立即受到影响的情况下推导出来的。在本贡献中，我描述了如何在反馈控制量子输运的主方程理论中引入检测和控制操作之间的延迟。我研究了延迟对状态稳定和麦克斯韦妖方案的影响。此外，我描述了延迟如何可以用作探测输运系统中电子相干振荡的工具，以及如何使用这个形式来建模有限的探测器带宽。
