Extraordinary wetting phase diagram for mixtures of Bose-Einstein condensates

Details Extraordinary wetting phase diagram for mixtures of Bose-Einstein condensates Extraordinary wetting phase diagram for mixtures of Bose-Einstein condensates

2004-10-14

arxiv.org/abs/cond-mat/0410368v1

Physical Review Letters 93, 210402 (2004)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 4 figures, accepted for publication in Phys. Rev. Lett. in slightly shortened form

Scientific paper

10.1103/PhysRevLett.93.210402

The possibility of wetting phase transitions in Bose-Einstein condensed gases is predicted on the basis of Gross-Pitaevskii theory. The surface of a binary mixture of Bose-Einstein condensates can undergo a first-order wetting phase transition upon varying the interparticle interactions, using, e.g., Feshbach resonances. Interesting ultralow-temperature effects shape the wetting phase diagram. The prewetting transition is, contrary to general expectations, not of first order but critical, and the prewetting line does not meet the bulk phase coexistence line tangentially. Experimental verification of these extraordinary results is called for, especially now that it has become possible, using optical methods, to realize a planar "hard wall" boundary for the condensates.

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