Quantum phase transitions in an interacting atom-molecule boson model

Details Quantum phase transitions in an interacting atom-molecule boson model Quantum phase transitions in an interacting atom-molecule boson model

2010-07-06

arxiv.org/abs/1007.0913v1

Physical Review A, 81, 063621 (2010)

Physics

Condensed Matter

Quantum Gases

6 pages, 10 figures

Scientific paper

10.1103/PhysRevA.81.063621

We study the quantum phase transitions of a model that describes the interconversion of interacting bosonic atoms and molecules. Using a classical analysis, we identify a threshold coupling line separating a molecular phase and a mixed phase. Through studies of the energy gap, von Neumann entanglement entropy, and fidelity, we give evidence that this line is associated to a boundary line in the ground-state phase diagram of the quantum system.

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