Renormalization group approach to the spin-1 Bose gas

Details Renormalization group approach to the spin-1 Bose gas Renormalization group approach to the spin-1 Bose gas

2005-05-26

arxiv.org/abs/cond-mat/0505657v4

Eur. Phys. J. D 37, 427-433 (2006)

Physics

Condensed Matter

Statistical Mechanics

7 pages, 5 figures included in text, final version, journal reference added

Scientific paper

10.1140/epjd/e2005-00318-y

A field theoretical renormalization group approach at two loop level is applied to the homogeneous spin-1 Bose gas in order to investigate the order of the phase transition. The beta function of the system with $d=4-\epsilon$ dimensions is determined up to the third power of the coupling constants and the system's free energy on the border of the classical stability is given in next to leading order. It is found that the phase transition of the interacting spin-1 Bose gases with weak spin-dependent coupling constant values is of first order.

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