Coherent control in quantum transport: Amplification, filtering and switching at finite bias

Thethi, Rajpal; Emary, Clive

Abstract

We consider coherent feedback control of quantum transport and focus on the application of simple controllers and the effects of a finite bias voltage. We show that simple single-parameter controllers can give rise to a range of useful effects such as amplification of changes in plant transmission, increased resolution of energy filtration, and the detection of differences between otherwise indistinguishable plants. We explore how these effects are impacted by the phase-averaging effects associated with finite bias and identify important voltage scales for the maintenance of the functionalities achieved through feedback control.

Citation

Thethi, R., & Emary, C. (2017). Coherent control in quantum transport: Amplification, filtering and switching at finite bias. Quantum Science and Technology, 2(2), 024011. https://doi.org/10.1088/2058-9565/aa72c8

• Journal Article Type: Article
• Acceptance Date: Mar 10, 2017
• Online Publication Date: Jun 15, 2017
• Publication Date: Jun 1, 2017
• Deposit Date: Jun 28, 2018
• Publicly Available Date: Jul 6, 2018
• Journal: Quantum Science and Technology
• Print ISSN: 2058-9565
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 2
• Issue: 2
• Pages: 024011
• DOI: https://doi.org/10.1088/2058-9565/aa72c8
• Public URL: https://hull-repository.worktribe.com/output/898311
• Publisher URL: http://iopscience.iop.org/article/10.1088/2058-9565/aa72c8
• Related Public URLs: https://eprints.ncl.ac.uk/238561
• Additional Information: Journal title: Quantum Science and Technology; Article type: paper; Article title: Coherent control in quantum transport: amplification, filtering and switching at finite bias; Copyright information: © 2017 IOP Publishing Ltd; Date received: 2017-03-10; Date accepted: 2017-05-12; Online publication date: 2017-06-16
• Contract Date: Jun 28, 2018