Dilute quantum liquid in a K-Rb Bose mixture
A quantum liquid in a heterogeneous mixture of 41K and 87Rb atoms is studied using the diffusion Monte Carlo method and density-functional theory. The perturbative Lee-Huang-Yang term for a heterogeneous mixture is verified and it is proved to be valid only near the gas-liquid transition. Based on t...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| 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:2117/355967 |
| Acceso en línea: | https://hdl.handle.net/2117/355967 https://dx.doi.org/10.1103/PhysRevA.104.033319 |
| Access Level: | acceso abierto |
| Palabra clave: | Quantum liquids Cold atoms & matter waves Dilute quantum liquid Bose mixture Líquids quàntics Àrees temàtiques de la UPC::Física |
| Sumario: | A quantum liquid in a heterogeneous mixture of 41K and 87Rb atoms is studied using the diffusion Monte Carlo method and density-functional theory. The perturbative Lee-Huang-Yang term for a heterogeneous mixture is verified and it is proved to be valid only near the gas-liquid transition. Based on the equations of state of the bulk mixture, calculated with diffusion Monte Carlo, extensions to Lee-Huang-Yang corrected mean-field energy functionals are presented. Using density-functional theory, a systematic comparison between different functionals is performed, focusing on the critical atom number, surface tension, surface width, Tolman length, and compressibility. These results are given as a function of the interspecies interaction strength, within the stability domain of the liquid mixture. |
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