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DOE OSTI · 21612329

Phase Separation and Pattern Formation in a Binary Bose-Einstein Condensate

Sabbatini, Jacopo·Davis, Matthew J·Zurek, Wojciech H
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Abstract

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 as a function of 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 ''quantum simulation'' of the harmonically trapped system in a ring trap to verify the scaling exponent.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICSBOSE-EINSTEIN CONDENSATIONMATHEMATICSPHASE TRANSFORMATIONSSCALING LAWSSIMULATIONSOLUBILITYTOPOLOGYTRAPPING

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Sabbatini, Jacopo, Davis, Matthew J, Zurek, Wojciech H. 2011-12-02. Phase Separation and Pattern Formation in a Binary Bose-Einstein Condensate. https://doi.org/10.1103/physrevlett.107.230402

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