کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10481147 933057 2013 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bose-Einstein condensation in the three-sphere and in the infinite slab: Analytical results
ترجمه فارسی عنوان
تراکم بوز-انیشتین در سه کره و در نامی بی نهایت: نتایج تحلیلی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات فیزیک ریاضی
چکیده انگلیسی
We study the finite size effects on Bose-Einstein condensation (BEC) of an ideal non-relativistic Bose gas in the three-sphere (spatial section of the Einstein universe) and in a partially finite box which is infinite in two of the spatial directions (infinite slab). Using the framework of grand-canonical statistics, we consider the number of particles, the condensate fraction and the specific heat. After obtaining asymptotic expansions for large system size, which are valid throughout the BEC regime, we describe analytically how the thermodynamic limit behaviour is approached. In particular, in the critical region of the BEC transition, we express the chemical potential and the specific heat as simple explicit functions of the temperature, highlighting the effects of finite size. These effects are seen to be different for the two different geometries. We also consider the Bose gas in a one-dimensional box, a system which does not possess BEC in the sense of a phase transition even in the infinite volume limit.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica A: Statistical Mechanics and its Applications - Volume 392, Issue 18, 15 September 2013, Pages 3984-3996
نویسندگان
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