| Autor: | B. P. van Zyl |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Condensed Matter::Quantum Gases
Density matrix Physics Phase transition Bose gas Condensed matter physics Transition temperature Diagonal Semiclassical physics Condensed Matter Physics Atomic and Molecular Physics and Optics law.invention law Phase (matter) Quantum mechanics General Materials Science Bose–Einstein condensate |
| Zdroj: | Journal of Low Temperature Physics. 132:207-222 |
| ISSN: | 0022-2291 |
| DOI: | 10.1023/a:1024409617342 |
| Popis: | We investigate the presence of off-diagonal long-range order in a harmonically confined two-dimensional Bose gas. In the noninteracting case, an analytical calculation of the the finite-temperature one-particle density matrix provides an exact description of the spatial correlations known to be associated with the existence of a Bose–Einstein condensate below the transition temperature T(0) c. We treat the effects of repulsive interactions within the semiclassical Hartree–Fock–Bogoliubov approximation and find that even though the system remains in the same uncondensed phase for all T≥0, there appears to be a revival of off-diagonal long-range order for temperatures T |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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