کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1856303 | 1529942 | 2008 | 39 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Representative statistical ensembles for Bose systems with broken gauge symmetry
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
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چکیده انگلیسی
Bose-condensed systems with broken global gauge symmetry are considered. The description of these systems, as has been shown by Hohenberg and Martin, possesses an internal inconsistency, resulting in either nonconserving theories or yielding an unphysical gap in the spectrum. The general notion of representative statistical ensembles is formulated for arbitrary statistical systems, equilibrium or not. The principal idea of this notion is the necessity of taking into account all imposed conditions that uniquely define the given statistical system. Employing such a representative ensemble for Bose-condensed systems removes all paradoxes, yielding a completely self-consistent theory, both conserving and gapless in any approximation. This is illustrated for an equilibrium uniform Bose system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Annals of Physics - Volume 323, Issue 2, February 2008, Pages 461-499
Journal: Annals of Physics - Volume 323, Issue 2, February 2008, Pages 461-499
نویسندگان
V.I. Yukalov,