Two-component Bose-Hubbard model in an array of cavity polaritons

Yong-Chang Zhang, Xiang-Fa Zhou, Xingxiang Zhou, Guang-Can Guo, Han Pu, and Zheng-Wei Zhou
Phys. Rev. A 91, 043633 – Published 29 April 2015

Abstract

We propose a scheme which can realize an extended two-component Bose-Hubbard model using polaritons confined in an array of optical cavities. In addition to the density-dependent interactions, this model also contains nonlinear coupling terms between the two components of the polariton. Using a mean-field calculation, we obtain the phase diagram which shows how these terms affect the transition between the Mott insulator and the superfluid phase. In addition, we employ both a perturbation approach and an exact diagonalization method to gain more insights into the phase diagram.

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  • Received 30 December 2014
  • Revised 17 March 2015

DOI:https://doi.org/10.1103/PhysRevA.91.043633

©2015 American Physical Society

Authors & Affiliations

Yong-Chang Zhang1,2, Xiang-Fa Zhou1,2, Xingxiang Zhou1,2, Guang-Can Guo1,2, Han Pu3,4,*, and Zheng-Wei Zhou1,2,†

  • 1Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, Anhui 230026, People's Republic of China
  • 2Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
  • 3Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
  • 4Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China

  • *hpu@rice.edu
  • zwzhou@ustc.edu.cn

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Issue

Vol. 91, Iss. 4 — April 2015

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