Density functional approach in the study of Bose-Bose liquid drops
| Autor: | Sanuy Latorre, Ares |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Física, Boronat Medico, Jordi |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Monte Carlo method
Quantum Monte Carlo methods Quantum Monte Carlo Lee-Huang-Yang Funcional de densitat Teoria del Física::Física de fluids [Àrees temàtiques de la UPC] Montecarlo Mètode de Condensació de Bose-Einstein quantum droplet critical number Bose-Einstein condensation density functional approach Density functionals |
| Popis: | We have studied quantum liquid drops composed by a mixture of two Bose components using a density-functional formulation. The functional has been built following two different methods: the beyond mean-field Lee-Huang-Yang (MFLHY) approximation and the Quantum Monte Carlo (QMC) method. Our main goal has been the calculation of the critical atomic number for binding using the two methods. The calculation has been carried out in free space, where spherical drops are formed, and under the compression produced by an external transversal harmonic confinement. Our results show that the finite-range effects, present in the QMC functional, obtained as the difference between the critical atom numbers between QMC and MFLHY, are small in spherical drops. In contrast, these effects are enhanced in compressed drops where the critical number shrinks. We have studied the effect of harmonic compression by increasing the strength of the confinement. |
| Databáze: | OpenAIRE |
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