Phase separation and pattern formation in a binary Bose-Einstein condensate

Details Phase separation and pattern formation in a binary Bose-Einstein condensate Phase separation and pattern formation in a binary Bose-Einstein condensate

2011-06-29

arxiv.org/abs/1106.5843v2

Phys. Rev. Lett. 107, 230402 (2011)

Physics

Condensed Matter

Quantum Gases

4 pages, 3 figure

Scientific paper

10.1103/PhysRevLett.107.230402

The miscibility-immiscibility phase transition in binary Bose-Einstein condensates (BECs) can be controlled by a coupling between the two components. Here we propose a new scheme that uses coupling-induced pattern formation to test the Kibble-Zurek mechanism (KZM) of topological-defect formation in a quantum phase transition. For a binary BEC in a ring trap we find that the number of domains forming the pattern scales with the coupling quench rate with an exponent as predicted by the KZM. For a binary BEC in an elongated harmonic trap we find a different scaling law due to the transition being spatially inhomogeneous. We perform a "simulation" of the harmonically trapped system in a ring trap to verify the scaling exponent.

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