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THERMAL AND TRANSPORT PROPERTIES OF A NONRELATIVISTIC QUANTUM GAS INTERACTING THROUGH A DELTA-SHELL POTENTIAL

SERGEY POSTNIKOV

Nuclear Theory Center, Indiana University, Bloomington, Indiana 47405, USA

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and

MADAPPA PRAKASH

Department of Physics and Astronomy, Ohio University, Athens, OH 45701-2979, USA

Corresponding author.

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https://doi.org/10.1142/S0218301313300233Cited by:0 (Source: Crossref)

Abstract

This work extends the seminal work of Gottfried on the two-body quantum physics of particles interacting through a delta-shell potential to many-body physics by studying a system of nonrelativistic particles when the thermal De-Broglie wavelength of a particle is larger than the range of the potential and the density is such that average distance between particles is larger than the above range. The ability of the delta-shell potential to reproduce some basic properties of the deuteron are examined. Relations for moments of bound-states are derived. The virial expansion is used to calculate the first quantum correction to the ideal gas pressure in the form of the second virial coefficient. Additionally, all thermodynamical functions are calculated up to the first-order quantum corrections. For small departures from equilibrium, the net flows of mass, energy and momentum, characterized by the coefficients of diffusion, thermal conductivity and shear viscosity, respectively, are calculated. Properties of the gas are examined for various values of physical parameters including the case of infinite scattering length when the unitary limit is achieved.

Keywords:

PACS: 03.75.Ss, 51.20.+d

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