Effective Hamiltonian and excitation spectrum of harmonically trapped bosons
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Effective Hamiltonian and excitation spectrum of harmonically trapped bosons
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| Creator |
Rovenchak, A.
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| Subject |
Бозе-эйнштейновская конденсация
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| Description |
An approach is proposed to obtain an effective Hamiltonian of a harmonically trapped Bose-system. Such a Hamiltonian is quadratic in the creation–annihilation operators and certain approximations allow to simplify higher (three and four operator) products to the required form. After the Hamiltonian diagonalization, the expression for the excitation spectrum is obtained containing in particular temperature-dependent corrections. Numerical calculations are made for a one-dimensional system. Some prospects towards the extension of the suggested approach to study binary bosonic mixtures are briefly discussed. |
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| Date |
2018-01-09T15:39:26Z
2018-01-09T15:39:26Z 2016 |
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| Type |
Article
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| Identifier |
Effective Hamiltonian and excitation spectrum of harmonically trapped bosons / A. Rovenchak // Физика низких температур. — 2016. — Т. 42, № 1. — С. 49–55. — Бібліогр.: 45 назв. — англ.
0132-6414 PACS: 03.75.–b, 05.30.–d, 67.85.–d http://dspace.nbuv.gov.ua/handle/123456789/128448 |
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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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