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λ-transition in low dimensional systems with SU_q(2) symmetry

Marcelo R. Ubriaco
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Abstract

We show that $SU_q(2)$ invariant systems in one and two dimensions exhibit Bose-Einstein condensation for $q >1$. For these systems there is a $λ$-transition at the critical temperature. The critical temperature and the gap in the heat capacity increase more rapidly for small deviations from the standard value $q=1$, and they become approximately constant for large values of $q$. For low temperatures and $q>1$ the entropy is lower than the entropy of an ideal Bose gas.

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Marcelo R. Ubriaco. 1997-11-26. λ-transition in low dimensional systems with SU_q(2) symmetry. https://doi.org/10.1016/s0375-9601(98)00149-2

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