Asymptotic exactness of c-number substitution in Bogolyubov's theory of superfluidity
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Asymptotic exactness of c-number substitution in Bogolyubov's theory of superfluidity
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| Creator |
Bogolyubov (jr), N.N.
Sankovich, D.P. |
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| Description |
The Bogolyubov model of liquid helium is considered. The validity of substituting a c-number for the k=0 mode operator â0 is established rigorously. The domain of stability of the Bogolyubov's Hamiltonian is found. We derive sufficient conditions which ensure the appearance of the Bose condensate in the model. For some temperatures and some positive values of the chemical potential, there is a gapless Bogolyubov spectrum of elementary excitations, leading to a proper microscopic interpretation of superfluidity.
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| Date |
2012-04-08T15:20:43Z
2012-04-08T15:20:43Z 2010 |
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| Type |
Article
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| Identifier |
Asymptotic exactness of c-number substitution in Bogolyubov's theory of superfluidity / N.N. Bogolyubov, Jr., D.P. Sankovich // Condensed Matter Physics. — 2010. — Т. 13, № 2. — С. 23002: 1-6. — Бібліогр.: 14 назв. — англ.
1607-324X PACS: 05.30.Jp, 03.75.Fi, 67.40.-w http://dspace.nbuv.gov.ua/handle/123456789/32088 |
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| Language |
en
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| Relation |
Condensed Matter Physics
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| Publisher |
Інститут фізики конденсованих систем НАН України
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