Deconfinement and Phase Diagram of Bosons in a Linear Optical Lattice with a Particle Reservoir

Phys. Rev. Lett. 94, 220402 – Published 6 June 2005
Kingshuk Majumdar and H. A. Fertig

Abstract

We investigate the zero-temperature phases of bosons in a one-dimensional optical lattice with an explicit tunnel coupling to a Bose-condensed particle reservoir. Renormalization group analysis of this system is shown to reveal three phases: one in which the linear system is fully phase locked to the reservoir; one in which Josephson vortices between the one-dimensional system and the particle reservoir deconfine due to quantum fluctuations, leading to a decoupled state in which the one-dimensional system is metallic; and one in which the one-dimensional system is in a Mott insulating state.

DOI: http://dx.doi.org/10.1103/PhysRevLett.94.220402

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  • Received 6 May 2004
  • Published 6 June 2005

© 2005 The American Physical Society

Authors & Affiliations

Kingshuk Majumdar1 and H. A. Fertig2,3

  • 1Department of Physics, Berea College, Berea, Kentucky 40404, USA
  • 2Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055, USA
  • 3Department of Physics, Indiana University, Bloomington, Indiana 47405, USA

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