Phys. Rev. Lett. 94, 220402 (2005) [4 pages]Deconfinement and Phase Diagram of Bosons in a Linear Optical Lattice with a Particle ReservoirReceived 6 May 2004; published 6 June 2005 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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.220402
DOI:
10.1103/PhysRevLett.94.220402
PACS:
03.75.Kk, 03.75.Lm, 03.75.Nt, 32.80.Pj
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