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Modern Physics Letters B

DEPLETION OF HARMONICALLY CONFINED, INTERACTING BOSE ATOMS FROM THE GROUND STATE

G. GNANAPRAGASAM, S.-H. Kim, Mrinmay Das

Published Dec 5, 2006• 1 citation
Publisher

Abstract

The macroscopic occupation of atoms in the ground state of an interacting Bose gas confined by an external harmonic potential is calculated as a function of the interaction strength. The effect of the inter-atomic interaction to the ground state distribution is discussed.
DOI
10.1142/s0217984906012304

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Interacting Bose gas confined by an external potential is studied using Green functions in spectral representation. The calculation is presented transparently using the equation of motion method. With this, the interplay between the condensed and the non-condensed atoms is inevitably seen. An expression for the condensate number at finite temperature is obtained in the lowest and first orders, from which depletion of bosons from the ground state is qualitatively analyzed. Finally, we discuss the behaviour of the specific heat of a trapped interacting Bose gas in the quasi-continuum limit.
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