title: Delayed feedback control in quantum transport.
abstract: 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.
authors: Department of Physics and Mathematics, University of Hull, Hull HU6 7RX, UK. c.emary@hull.ac.uk
authors: Clive
authors: C
authors: Emary
keywords: delay; feedback control; quantum dots; quantum transport