Interfacial tension and wall energy of a Bose-Einstein condensate binary mixture: Triple-parabola approximation
| العنوان: | Interfacial tension and wall energy of a Bose-Einstein condensate binary mixture: Triple-parabola approximation |
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| المؤلفون: | Bert Van Schaeybroeck, Zehui Deng, Chang-You Lin, Nguyen Van Thu, Joseph Indekeu |
| بيانات النشر: | AMSTERDAM, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Statistics and Probability, Binary number, FOS: Physical sciences, Bose-Einstein condensation, 01 natural sciences, 010305 fluids & plasmas, law.invention, Surface tension, law, Simple (abstract algebra), Quantum mechanics, 0103 physical sciences, 010306 general physics, Ultracold gases, Condensed Matter - Statistical Mechanics, Physics, Condensed Matter::Quantum Gases, Statistical Mechanics (cond-mat.stat-mech), Parabola, Order (ring theory), Statistical and Nonlinear Physics, Amplitude, Quantum Gases (cond-mat.quant-gas), Condensed Matter - Quantum Gases, Interfacial tension, Bose–Einstein condensate, Energy (signal processing) |
| الوصف: | 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 $\xi_1$ and $\xi_2$. The inter-atomic interactions are repulsive. In particular, the effective 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. Comment: 25 pages, 8 figures |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb0d81a6417b01c36f2daca8fc61c12c https://lirias.kuleuven.be/handle/123456789/539561 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....fb0d81a6417b01c36f2daca8fc61c12c |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |