Identifying the order of a quantum phase transition by means of Wehrl entropy in phase space

Castaños O. Calixto M. Pérez-Bernal F. Romera E.
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Doi 10.1103/PhysRevE.92.052106
Volumen 92
2015-11-06
Citas: 5
Abstract
© 2015 American Physical Society. We propose a method to identify the order of a quantum phase transition by using area measures of the ground state in phase space. We illustrate our proposal by analyzing the well known example of the quantum cusp and four different paradigmatic boson models: Dicke, Lipkin-Meshkov-Glick, interacting boson model, and vibron model.
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