Thermodynamic analogy for quantum phase transitions at zero temperature

Details Thermodynamic analogy for quantum phase transitions at zero temperature Thermodynamic analogy for quantum phase transitions at zero temperature

2004-06-17

arxiv.org/abs/nucl-th/0406060v1

Phys.Rev. C71 (2005) 011304

Physics

Nuclear Physics

Nuclear Theory

14 pages, 5 figures

Scientific paper

10.1103/PhysRevC.71.011304

We propose a relationship between thermodynamic phase transitions and ground-state quantum phase transitions in systems with variable Hamiltonian parameters. It is based on a link between zeros of the canonical partition function at complex temperatures and exceptional points of a quantum Hamiltonian in the complex-extended parameter space. This approach is applied in the interacting boson model, where it is shown to properly distinguish the first- and second-order phase transitions.

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