کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7378555 | 1480129 | 2016 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Interfacial tension and wall energy of a Bose-Einstein condensate binary mixture: Triple-parabola approximation
ترجمه فارسی عنوان
تنش موازی و انرژی دیواره مخلوط دوتایی مخلوط مایع بوز-اینشتین: تقریب سهبعدی
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کلمات کلیدی
گازهای فوق العاده سرد تراکم بوزینه انیشتین، کشش سطحی،
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
چکیده انگلیسی
Accurate and useful analytic approximations are developed for order parameter profiles and interfacial tensions of phase-separated binary mixtures of Bose-Einstein condensates. The pure condensates 1 and 2, each of which contains a particular species of atoms, feature healing lengths ξ1 and ξ2. The inter-atomic interactions are repulsive. In particular, the reduced inter-species repulsive interaction strength is K. A triple-parabola approximation (TPA) is proposed, to represent closely the energy density featured in Gross-Pitaevskii (GP) theory. This TPA allows us to define a model, which is a handy alternative to the full GP theory, while still possessing a simple analytic solution. The TPA offers a significant improvement over the recently introduced double-parabola approximation (DPA). In particular, a more accurate amplitude for the wall energy (of a single condensate) is derived and, importantly, a more correct expression for the interfacial tension (of two condensates) is obtained, which describes better its dependence on K in the strong segregation regime, while also the interface profiles undergo a qualitative improvement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 444, 15 February 2016, Pages 1027-1040
Journal: Physica A: Statistical Mechanics and its Applications - Volume 444, 15 February 2016, Pages 1027-1040
نویسندگان
Zehui Deng, Bert Van Schaeybroeck, Chang-You Lin, Nguyen Van Thu, Joseph O. Indekeu,