Real-space condensation in a dilute Bose gas at low temperature
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Real-space condensation in a dilute Bose gas at low temperature
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| Creator |
Kulik, I.O.
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| Subject |
Статьи, посвященные столетию со дня рождения Л. В. Шубникова
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| Description |
We show with a direct numerical analysis that a dilute Bose gas in an external potential - which is choosen for simplicity as a radial parabolic well - undergoes at certain temperature Tc a phase transition to a state supporting macroscopic fraction of particles at the origin of the phase space (r=0,p=0). Quantization of particle motion in a well wipes out sharp transition but supports a distribution of radial particle density ρ(r) peacked at r=0 (a real-space condensate) as well as the phase-space Wigner distribution density W(r, p) peaked at r=0 and p=0 below the crossover temperature Tc* of order of Tc. Fixed-particle-number canonical ensemble which is a combination of the fixed-μ condensate part and the fixed-m excitation part is suggested to resolve the difficulty of large fluctuation of the particle number (δN~N) in the Bose-Einstein condensation problem treated within the orthodox grand canonical ensemble formalism.
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| Date |
2018-01-15T13:15:33Z
2018-01-15T13:15:33Z 2001 |
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| Type |
Article
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| Identifier |
Real-space
condensation in a dilute Bose gas at low temperature / I.O. Kulik // Физика низких
температур. — 2001. — Т. 27, № 9-10. — С. 1179-1182. — Бібліогр.: 17 назв. — англ.
0132-6414 PACS: 64.60.-i http://dspace.nbuv.gov.ua/handle/123456789/129021 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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