Manipulating quantum materials with quantum light

Martin Kiffner, Jonathan R. Coulthard, Frank Schlawin, Arzhang Ardavan, and Dieter Jaksch
Phys. Rev. B 99, 085116 – Published 11 February 2019; Erratum Phys. Rev. B 99, 099907 (2019)

Abstract

We show that the macroscopic magnetic and electronic properties of strongly correlated electron systems can be manipulated by coupling them to a cavity mode. As a paradigmatic example we consider the Fermi-Hubbard model and find that the electron-cavity coupling enhances the magnetic interaction between the electron spins in the ground-state manifold. At half filling this effect can be observed by a change in the magnetic susceptibility. At less than half filling, the cavity introduces a next-nearest-neighbor hopping and mediates a long-range electron-electron interaction between distant sites. We study the ground-state properties with tensor network methods and find that the cavity coupling can induce a phase characterized by a momentum-space pairing effect for electrons.

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  • Received 18 June 2018
  • Revised 25 January 2019

DOI:https://doi.org/10.1103/PhysRevB.99.085116

©2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalCondensed Matter, Materials & Applied Physics

Erratum

Erratum: Manipulating quantum materials with quantum light [Phys. Rev. B 99, 085116 (2019)]

Martin Kiffner, Jonathan R. Coulthard, Frank Schlawin, Arzhang Ardavan, and Dieter Jaksch
Phys. Rev. B 99, 099907 (2019)

Authors & Affiliations

Martin Kiffner1,2, Jonathan R. Coulthard2, Frank Schlawin2, Arzhang Ardavan2, and Dieter Jaksch2,1

  • 1Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543
  • 2Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom

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Issue

Vol. 99, Iss. 8 — 15 February 2019

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