Ground State Pressure and Energy Density of a Homogeneous Bose Gas in Two Dimensions

Details Ground State Pressure and Energy Density of a Homogeneous Bose Gas in Two Dimensions Ground State Pressure and Energy Density of a Homogeneous Bose Gas in Two Dimensions

2001-08-13

arxiv.org/abs/cond-mat/0108197v2

Physics

Condensed Matter

1 figure, revtex

Scientific paper

We consider an interacting homogeneous Bose gas at zero temperature in two spatial dimensions. The properties of the system can be calculated as an expansion in powers of g, where g is the coupling constant. We calculate the ground state pressure and the ground state energy density to second order in the quantum loop expansion. The renormalization group is used to sum up leading and subleading logarithms from all orders in perturbation theory. In the dilute limit, the renormalization group improved pressure and energy density are essentially expansions in powers of the T-matrix.

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