Quantum phase transitions in an interacting atom-molecule boson model

Abstract

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.

6 pages, 10 figures

References in corpus (4)

• Strong dipolar effects in a quantum ferrofluid
• Universality in nonadiabatic behaviour of classical actions in nonlinear models with separatrix crossings
• Change in the adiabatic invariant in a nonlinear two-mode model of Feshbach resonance passage
• On quantum phase crossovers in finite systems

Cited by in corpus (1)

• Finite-size effects in Anderson localization of one-dimensional Bose-Einstein condensates