Mixtures of Dipolar Gases in Two Dimensions: A Quantum Monte Carlo Study

Authors :: Sergi Pradas Rodriguez
Jordi Boronat
Universitat Politècnica de Catalunya. Departament de Física
Universitat Politècnica de Catalunya. SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity
Source :: Condensed Matter; Volume 7; Issue 2; Pages: 32, UPCommons. Portal del coneixement obert de la UPC, Universitat Politècnica de Catalunya (UPC)
Publication Year :: 2022
Publisher :: MDPI AG, 2022.
Abstract: We studied the miscibility of two dipolar quantum gases in the limit of zero temperature. The system under study is composed by a mixture of two Bose gases with dominant dipolar interaction in a two-dimensional harmonic confinement. The dipolar moments are considered all to be perpendicular to the plane, turning the dipolar potential in a purely repulsive and isotropic model. Our analysis is carried out by using the diffusion Monte Carlo method which allows for an exact solution to the many-body problem within some statistical noise. Our results show that the miscibility between the two species is rather constrained as a function of the relative dipolar moments and masses of the two components. A narrow regime is predicted where both species mix and we introduce an adimensional parameter whose value predicts quite accurately the miscibility of the two dipolar gases.<br />Comment: 14 pages, 7 figures