Quantum Phase Transition in an Atomic Bose Gas with a Feshbach Resonance - INSPIRE

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Quantum Phase Transition in an Atomic Bose Gas with a Feshbach Resonance

Dec, 2003

4 pages

Published in:

Phys.Rev.Lett. 93 (2004) 020405

e-Print:

cond-mat/0312446 [cond-mat.supr-con]

DOI:

10.1103/PhysRevLett.93.020405

View in:

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Abstract: (arXiv)

We show that in an atomic Bose gas near a Feshbach resonance a quantum phase transition occurs between a phase with only a molecular Bose-Einstein condensate and a phase with both an atomic and a molecular Bose-Einstein condensate. We show that the transition is characterized by an Ising order parameter. We also determine the phase diagram of the gas as a function of magnetic field and temperature: the quantum critical point extends into a line of finite temperature Ising transitions.

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