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Multicritical crossovers near the dilute Bose gas quantum critical point

Kedar Damle·Subir Sachdev
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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.

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Kedar Damle, Subir Sachdev. 1996-02-13. Multicritical crossovers near the dilute Bose gas quantum critical point. https://doi.org/10.1103/physrevlett.76.4412

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