Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2007-10-31
Phys. Rev. Lett. 100, 160406 (2008)
Physics
Condensed Matter
Other Condensed Matter
Final published version, modified title
Scientific paper
10.1103/PhysRevLett.100.160406
We analytically calculate the spatial nonlocal pair correlation function for an interacting uniform 1D Bose gas at finite temperature and propose an experimental method to measure nonlocal correlations. Our results span six different physical realms, including the weakly and strongly interacting regimes. We show explicitly that the characteristic correlation lengths are given by one of four length scales: the thermal de Broglie wavelength, the mean interparticle separation, the healing length, or the phase coherence length. In all regimes, we identify the profound role of interactions and find that under certain conditions the pair correlation may develop a global maximum at a finite interparticle separation due to the competition between repulsive interactions and thermal effects.
Davis Mark J.
Gangardt Dimitri M.
Kheruntsyan Karen V.
Raizen Mark G.
Sykes Andrew G.
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