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Title

Nonlocal pair correlations in the one-dimensional Bose gas at finite temperature

Author(s)

Deuar, P.;  Sykes, Andrew G.;  Gangardt, D. M.;  Davis, Matthew J.;  Drummond, P. D.;  Kheruntsyan, K. V.

Abstract

The behavior of the spatial two-particle correlation function is surveyed in detail for a uniform one-dimensional Bose gas with repulsive contact interactions at finite temperatures. Long-, medium-, and short-range effects are investigated. The results span the entire range of physical regimes from ideal gas to strongly interacting and from zero temperature to high temperature (Gross-Pitaevskii) and strongly interacting (Tonks-Girardeau) gases. We present perturbative analytic methods, available at strong and weak couplings, and first-principles numerical results using imaginary time simulations with the gauge-P representation in regimes where perturbative methods are invalid. Nontrivial effects are observed from the interplay of thermally induced bunching behavior versus interaction induced antibunching.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Atom Optics and Ultrafast Spectroscopy. ARC Centre of Excellence for Quantum-Atom Optics

Source

Physical Review A: Atomic, Molecular and Optical Physics, Vol. 79, no. 4 (Apr 2009)

Publication year

2009

FOR Code(s)

0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics;  0204 Condensed Matter Physics;  0205 Optical Physics

Keyword(s)

Antibunching;  Boson systems;  Fermons;  Impenetrable bosons;  Perturbation theory;  Photons;  Tonks-Girardeau gas

Publisher

American Physical Society

ISSN

1050-2947

Publisher URL

http://dx.doi.org/10.1103/PhysRevA.79.043619

Copyright

Copyright © 2009 American Physical Society. Published version of the paper reproduced here with the kind permission of the publisher for non-commercial purposes only.

Full text

Peer reviewed