Deconfinement and Phase Diagram of Bosons in a Linear Optical Lattice with a Particle Reservoir
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.
- Publication:
-
Physical Review Letters
- Pub Date:
- June 2005
- DOI:
- 10.1103/PhysRevLett.94.220402
- arXiv:
- arXiv:cond-mat/0405114
- Bibcode:
- 2005PhRvL..94v0402M
- Keywords:
-
- 03.75.Kk;
- 03.75.Lm;
- 03.75.Nt;
- 32.80.Pj;
- Dynamic properties of condensates;
- collective and hydrodynamic excitations superfluid flow;
- Tunneling Josephson effect Bose-Einstein condensates in periodic potentials solitons vortices and topological excitations;
- Other Bose-Einstein condensation phenomena;
- Optical cooling of atoms;
- trapping;
- Condensed Matter - Statistical Mechanics;
- Condensed Matter - Mesoscopic Systems and Quantum Hall Effect;
- Physics - Atomic Physics;
- Quantum Physics
- E-Print:
- Revised version. Four pages and three figures. To appear in Phys. Rev. Lett