Accessing elusive two-dimensional phases of dipolar Bose-Einstein condensates by finite temperature
It has been shown that dipolar Bose-Einstein condensates that are tightly trapped along the polarization direction can feature a rich phase diagram. In this paper we show that finite temperature can assist in accessing parts of the phase diagram that otherwise appear hard to realize due to excessive...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/429254 |
| Acceso en línea: | https://hdl.handle.net/2117/429254 https://dx.doi.org/10.1103/PhysRevResearch.7.023019 |
| Access Level: | acceso abierto |
| Palabra clave: | Bose gases Bose-Einstein condensates Dipolar gases Quantum phase transitions Ultracold gases Àrees temàtiques de la UPC::Física::Física molecular Àrees temàtiques de la UPC::Física::Física de l'estat sòlid::Superconductors |
| Sumario: | It has been shown that dipolar Bose-Einstein condensates that are tightly trapped along the polarization direction can feature a rich phase diagram. In this paper we show that finite temperature can assist in accessing parts of the phase diagram that otherwise appear hard to realize due to excessively large densities and number of atoms being required. These include honeycomb and stripe phases both unconfined and with a finite extent. To map out a phase-diagram, we employ both variational analysis and full numerical calculations solving the finite-temperature extended Gross-Pitaevskii equation (TeGPE). Furthermore, we exhibit real-time evolution simulations leading to such states. We account for the effect of thermal fluctuations by means of Bogoliubov theory, employing the local density approximation. We find that finite temperatures can lead to a significant decrease in the necessary particle number and density that might ultimately pave a route for future experimental realizations. |
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