Abstract
Using double-parabola approximation (DPA) applied to Gross–Pitaevskii theory, the interfacial tension of Bose–Einstein condensate mixtures in semi-infinite system is obtained and shows that it is not vanishing at demix state K=1, its value exactly coincides to wall tension of second component. A new kind of wetting phase transition (Antonov transition) is also considered within DPA and phase transition is first-order. Antonov line is thoroughly proved, too.
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