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

P Deuar, AG Sykes, Dimitri Gangardt, MJ Davis, PD Drummond, KV Kheruntsyan

Research output: Contribution to journalArticle

42 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)043619
Number of pages1
JournalPhysical Review A
Issue number4
Publication statusPublished - 1 Apr 2009


  • perturbation theory
  • numerical analysis
  • boson systems
  • photon antibunching


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