Multicritical crossovers near the dilute Bose gas quantum critical point

Abstract

Many zero temperature transitions, involving the deviation in the value of a $U(1)$ conserved charge from a quantized value, are described by the dilute Bose gas quantum critical point. On such transitions, we study the consequences of perturbations which break the symmetry down to $Z_N$ in $d$ spatial dimensions. For the case $d=1$, $N=2$, we obtain exact, finite temperature, multicritical crossover functions by a mapping to an integrable lattice model.

10 pages, REVTEX 3.0, 2 EPS figures

References in corpus (2)

• Finite Temperature Properties of Quantum Antiferromagnets in a Uniform Magnetic Field in One and Two Dimensions
• Universal, finite temperature, crossover functions of the quantum transition in the Ising chain in a transverse field

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