Cross-over to quasi-condensation: mean-field theories and beyond
- We analyze the cross-over of a homogeneous, weakly interacting Bose gas in one dimension from the ideal gas into the dense quasi-condensate phase. We review a number of mean-field theories, perturbative or self-consistent, and provide accurate evaluations of equation of state, density fluctuations, and correlation functions. A smooth crossover is reproduced by classical-field simulations based on the stochastic Gross-Pitaevskii equation and the Yang-Yang solution to the one-dimensional Bose gas.
| Author details: | Carsten HenkelORCiDGND, Tim-O Sauer, N. P. Proukakis |
|---|---|
| DOI: | https://doi.org/10.1088/1361-6455/aa6888 |
| ISSN: | 0953-4075 |
| ISSN: | 1361-6455 |
| Title of parent work (English): | Journal of physics : B, Atomic, molecular and optical physics |
| Publisher: | IOP Publ. Ltd. |
| Place of publishing: | Bristol |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2017 |
| Publication year: | 2017 |
| Release date: | 2020/04/20 |
| Tag: | Bose-Einstein condensation; critical fluctuations; phase transition; quantum gases |
| Volume: | 50 |
| Number of pages: | 19 |
| Funding institution: | Deutsche Forschungsgemeinschaft [Schm-1049/7-1, Fo 703/2-1]; EPSRC [EP/F055935/1] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Peer review: | Referiert |
