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Photon-blockade-induced Mott transitions and XY spin models in coupled cavity arrays

Dimitris G. Angelakis, Marcelo Franca Santos, and Sougato Bose
Phys. Rev. A 76, 031805(R) – Published 28 September 2007

Abstract

We propose a physical system where photons could exhibit strongly correlated effects. We demonstrate how a Mott-insulator phase of atom-photon excitations (polaritons) can arise in an array of individually addressable coupled electromagnetic cavities when each of these cavities is coupled resonantly to a single two-level system (atom, quantum dot, or Cooper pair). This Mott phase is characterized by the same integral number of net polaritonic excitations with photon blockade providing the required repulsion between the excitations in each site. Detuning the atomic and photonic frequencies suppresses this effect and induces a transition to a photonic superfluid. Finally, on resonance the system can straightforwardly simulate the dynamics of many-body spin systems.

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  • Received 15 December 2006

DOI:https://doi.org/10.1103/PhysRevA.76.031805

©2007 American Physical Society

Authors & Affiliations

Dimitris G. Angelakis1,*, Marcelo Franca Santos2, and Sougato Bose3

  • 1Centre for Quantum Computation, Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Wilberforce Road, CB3 0WA, United Kingdom
  • 2Departamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte, 30161-970, Minas Gerais, Brazil
  • 3Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, United Kingdom

  • *dimitris.angelakis@qubit.org

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Issue

Vol. 76, Iss. 3 — September 2007

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