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Quantum optics of chiral spin networks

Hannes Pichler, Tomás Ramos, Andrew J. Daley, and Peter Zoller
Phys. Rev. A 91, 042116 – Published 14 April 2015

Abstract

We study the driven-dissipative dynamics of a network of spin-1/2 systems coupled to one or more chiral 1D bosonic waveguides within the framework of a Markovian master equation. We determine how the interplay between a coherent drive and collective decay processes can lead to the formation of pure multipartite entangled steady states. The key ingredient for the emergence of these many-body dark states is an asymmetric coupling of the spins to left and right propagating guided modes. Such systems are motivated by experimental possibilities with internal states of atoms coupled to optical fibers, or motional states of trapped atoms coupled to a spin-orbit coupled Bose-Einstein condensate. We discuss the characterization of the emerging multipartite entanglement in this system in terms of the Fisher information.

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  • Received 14 November 2014

DOI:https://doi.org/10.1103/PhysRevA.91.042116

©2015 American Physical Society

Authors & Affiliations

Hannes Pichler1,2,*, Tomás Ramos1,2, Andrew J. Daley3, and Peter Zoller1,2,4

  • 1Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, 6020 Innsbruck, Austria
  • 2Institute for Theoretical Physics, University of Innsbruck, 6020 Innsbruck, Austria
  • 3Department of Physics and SUPA, University of Strathclyde, Glasgow G4 0NG, UK
  • 4Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany

  • *hannes.pichler@uibk.ac.at

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Vol. 91, Iss. 4 — April 2015

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