The correlation length exponent of the hard-sphere Bose-Einstein condensate by path integral calculations
Joint Institute for High Temperature, Russian Academy of Sciences - Moscow, Russia
Received: 12 September 2012
Accepted: 7 March 2013
The correlation length exponent ν has been calculated for the hard-sphere Bose-Einstein condensation by path integral Monte Carlo simulations in the Feynman formulation of quantum mechanics. This new calculation method allows to determine the density dependence of the correlation length exponent. It is shown that ν, being equal to unity for an ideal gas, is close to 2/3 for boson hard spheres in a wide range of gas densities with an accuracy of 10%.
PACS: 03.75.Hh – Static properties of condensates; thermodynamical, statistical, and structural properties
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