Few-body bound states of two-dimensional bosons
Visualitza/Obre
10.1103/PhysRevA.101.041602
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/330657
Tipus de documentArticle
Data publicació2020-04-07
EditorAmerican Physical Society (APS)
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
We study clusters of the type $A_NB_M$ with N=M=3 in a two-dimensional mixture of A and B bosons, with attractive AB and equally repulsive AA and BB interactions. In order to check universal aspects of the problem, we choose two very different models: dipolar bosons in a bilayer geometry and particles interacting via separable Gaussian potentials. We find that all the considered clusters are bound and that their energies are universal functions of the scattering lengths $a_{AB}$ and $a{AA}=a_{BB}$, for sufficiently large attraction-to-repulsion ratios $a_{AB}/a_{BB}$. When $a_{AB}/a_{BB}$ decreases below ˜10, the dimer-dimer interaction changes from attractive to repulsive and the population-balanced AABB and AAABBB clusters break into AB dimers. Calculating the AAABBB hexamer energy just below this threshold, we find an effective three-dimer repulsion which may have important implications for the many-body problem, particularly for observing liquid and supersolid states of dipolar dimers in the bilayer geometry. The population-imbalanced ABB trimer, ABBB tetramer, and AABBB pentamer remain bound beyond the dimer-dimer threshold. In the dipolar model, they break up at $a_{AB}˜2a_{BB}, where the atom-dimer interaction switches to repulsion.
CitacióGuijarro, G. [et al.]. Few-body bound states of two-dimensional bosons. "Physical review A", 7 Abril 2020, vol. 101, núm. 4, p. 041602:1-041602:6.
ISSN2469-9926
Versió de l'editorhttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.101.041602
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
FewBodyBoundStatesinTwoDimensionalBosons.pdf | 438,8Kb | Visualitza/Obre |