Kinetics of the Phase Separation Transition in Cold-Atom Boson-Fermion Mixtures

Details Kinetics of the Phase Separation Transition in Cold-Atom Boson-Fermion Mixtures Kinetics of the Phase Separation Transition in Cold-Atom Boson-Fermion Mixtures

2007-12-04

arxiv.org/abs/0712.0557v2

Phys. Rev. Lett. 100, 150402 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages 1 figure, typos corrected

Scientific paper

10.1103/PhysRevLett.100.150402

We study the kinetics of the first order phase separation transition in boson-fermion cold-atom mixtures. At sufficiently low temperatures such a transition is driven by quantum fluctuations responsible for the formation of critical nuclei of a stable phase. Based on a microscopic description of interacting boson-fermion mixtures we derive an effective action for the critical droplet and obtain an asymptotic expression for the nucleation rate in the vicinity of the phase transition and near the spinodal instability of the mixed phase. We also discuss effects of dissipation which play a dominant role close to the transition point, and identify the regimes where quantum nucleation can be experimentally observed in cold-atom systems.

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