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

Lookup NU author(s): Dr Clive Emary

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Abstract

We consider coherent feedback control of quantum transport and focus on the application of simplecontrollers and the effects of a finite bias voltage. We show that simple single-parameter controllerscan 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 otherwiseindistinguishable plants. We explore how these effects are impacted by the phase-averaging effectsassociated with finite bias and identify important voltage scales for the maintenance of thefunctionalities achieved through feedback control.

Publication metadata

Author(s): Thethi R, Emary C

Publication type: Article

Publication status: Published

Journal: Quantum Science and Technology

Year: 2017

Volume: 2

Print publication date: 16/06/2017

Online publication date: 12/05/2017

Acceptance date: 12/05/2017

Date deposited: 02/06/2017

ISSN (electronic): 2058-9565

Publisher: Institute of Physics

URL: https://doi.org/10.1088/2058-9565/aa72c8

DOI: 10.1088/2058-9565/aa72c8

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