A Phase Transition in a Quantum Crystal with Asymmetric Potentials∗

Abstract

A translation invariant system of interacting quantum anharmonic oscillators indexed by the elements of a simple cubic lattice Z is considered. The anharmonic potential is of general type, which in particular means that it might have no symmetry. For this system, we prove that the global polarization (obtained in the thermodynamic limit) gets discontinuous… (More)

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