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  • Letter
  • Open Access

Out-of-equilibrium steady states of a locally driven lossy qubit array

Shovan Dutta* and Nigel R. Cooper†

  • T.C.M. Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom

  • *sd843@cam.ac.uk
  • †nrc25@cam.ac.uk
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Phys. Rev. Research 3, L012016 – Published 16 February, 2021

DOI: https://doi.org/10.1103/PhysRevResearch.3.L012016

Abstract

We find a rich variety of counterintuitive features in the steady states of a qubit array coupled to a dissipative source and sink at two arbitrary sites, using a master equation approach. We show there are setups where increasing the pump and loss rates establishes long-range coherence. At sufficiently strong dissipation, the source or sink effectively generates correlation between its neighboring sites, leading to a striking density-wave order for a class of “resonant” geometries. This effect can be used more widely to engineer nonequilibrium phases. We show the steady states are generically distinct for hard-core bosons and free fermions, and differ significantly from the ones found before in special cases. They are explained by generally applicable ansatzes for the long-time dynamics at weak and strong dissipation. Our findings are relevant for existing photonic setups.

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Outline

Information

Phys. Rev. Research 3, L012016– Published 16 February, 2021
  • Received 17 July 2020
  • Accepted 12 January 2021
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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