Temperature-induced miscibility of impurities in trapped Bose gases
We study the thermal properties of impurities embedded in a repulsive Bose gas under a harmonic trapping potential. In order to obtain the exact structural properties in this inhomogeneous many-body system, we resort to the path-integral Monte Carlo method. We find that, at low temperatures, a singl...
| Autores: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| 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:2117/406721 |
| Acceso en línea: | https://hdl.handle.net/2117/406721 https://dx.doi.org/10.1103/PhysRevResearch.6.L022014 |
| Access Level: | acceso abierto |
| Palabra clave: | Bose-Einstein condensation Monte Carlo method Atomic and molecular physics Path-integral Monte Carlo Superfluid density Condensació de Bose-Einstein Montecarlo, Mètode de Àrees temàtiques de la UPC::Física |
| Sumario: | We study the thermal properties of impurities embedded in a repulsive Bose gas under a harmonic trapping potential. In order to obtain the exact structural properties in this inhomogeneous many-body system, we resort to the path-integral Monte Carlo method. We find that, at low temperatures, a single impurity is expelled to the edges of the bath cloud if the impurity-boson coupling constant is larger than the boson-boson one. However, when the temperature is increased, but still in the Bose-condensed phase, the impurity occupies the center of the trap and, thus, the system becomes miscible. This thermal-induced miscibility crossover is also observed for a finite concentration of impurities in this inhomogeneous system. We find that the transition temperature for miscibility depends on the impurity-boson interaction and we indicate a different nondestructive method to measure the temperature of a system based on the studied phenomenon. |
|---|