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Application of Renormalization Group Techniques to a Homogeneous Bose Gas at Finite Temperature

Jens O. Andersen·Michael Strickland
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Abstract

A homogeneous Bose gas is investigated at finite temperature using renormalization group techniques. A non--perturbative flow equation for the effective potential is derived using sharp and smooth cutoff functions. Numerical solutions of these equations show that the system undergoes a second order phase transition in accordance with universality arguments. We obtain the critical exponent $ν=0.73$ to leading order in the derivative expansion.

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Jens O. Andersen, Michael Strickland. 1999-02-11. Application of Renormalization Group Techniques to a Homogeneous Bose Gas at Finite Temperature. https://doi.org/10.1103/physreva.60.1442

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