Backaction effects in cavity-coupled quantum conductors

Valeriu Moldoveanu, Ion Viorel Dinu, Andrei Manolescu, and Vidar Gudmundsson
Phys. Rev. B 100, 125416 – Published 12 September 2019

Abstract

We study the electronic transport through a pair of distant nanosystems (Sa and Sb) embedded in a single-mode cavity. Each system is connected to source and drain particle reservoirs and the electron-photon coupling is described by the Tavis-Cummings model. The generalized master equation approach provides the reduced density operator of the double system in the dressed-states basis. It is shown that the photon-mediated coupling between the two subsystems leaves a signature on their transient and steady-state currents. In particular, a suitable bias applied on subsystem Sb induces a photon-assisted current in the other subsystem Sa which is otherwise in the Coulomb blockade. We also predict that a transient current passing through one subsystem triggers a charge transfer between the optically active levels of the second subsystem even if the latter is not connected to the leads. As a result of backaction, the transient current through the open system develops Rabi oscillations (ROs) whose period depends on the initial state of the closed system.

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  • Received 19 June 2019
  • Revised 26 August 2019

DOI:https://doi.org/10.1103/PhysRevB.100.125416

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Valeriu Moldoveanu1,2,*, Ion Viorel Dinu1,2, Andrei Manolescu3, and Vidar Gudmundsson4

  • 1National Institute of Materials Physics, Atomistilor 405A, Magurele 077125, Romania
  • 2Centre International de Formation et de Recherche Avancées en Physique, Atomistilor 407, Magurele 077125, Romania
  • 3School of Science and Engineering, Reykjavik University, Menntavegur 1, IS-101 Reykjavik, Iceland
  • 4Science Institute, University of Iceland, Dunhaga 3, IS-107 Reykjavik, Iceland

  • *Corresponding author: valim@infim.ro

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Issue

Vol. 100, Iss. 12 — 15 September 2019

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