Bose–Einstein condensation in one-dimensional optical lattices: Bogoliubov’s approximation and beyond
| Autor: | Mufeed Awawdeh, M. K. Al-Sugheir, Humam B. Ghassib, Emad Alhami |
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| Rok vydání: | 2016 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Optical lattice Number density Bose gas Condensed matter physics Condensed Matter::Other Filling factor General Physics and Astronomy 01 natural sciences 010305 fluids & plasmas law.invention symbols.namesake law Quantum mechanics 0103 physical sciences symbols Bose–Einstein condensation 010306 general physics Hamiltonian (quantum mechanics) Bose–Einstein condensate |
| Zdroj: | Canadian Journal of Physics. 94:697-703 |
| ISSN: | 1208-6045 0008-4204 |
| Popis: | Bose–Einstein condensation in a finite one-dimensional atomic Bose gas trapped in an optical lattice is studied within Bogoliubov’s approximation and then beyond this approximation, within the static fluctuation approximation. A Bose–Hubbard model is used to construct the Hamiltonian of the system. The effect of the potential strength on the condensate fraction is explored at different temperatures; so is the effect of temperature on this fraction at different potential strengths. The role of the number of lattice points (the size effect) at constant number density (the filling factor) is examined; so is the effect of the number density on the condensate fraction. The results obtained are compared to other published results wherever possible. |
| Databáze: | OpenAIRE |
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