Dilute quantum liquid in a K-Rb Bose mixture

Weber number and the outcome of binary collisions between quantum droplets

“…( 52) has been reported in Ref. [19] for Rb-K mixtures and particular values of the a αβ coupling parameters.…”

“…[18,19] We have also found that in the incompressible and compressible regimes the elementary Bogolubov excitations, Eq. (19)(20)(21)(22), are better described in a variational basis by Eqs. ( 23) and ( 24) respectively.…”

“…They manifest not only on the minimum number of atoms required for self-trapping, but also on the radius R 0 and thickness of the surface dR of the droplets; their dependence on the scattering lenghts is discussed at depth in Ref. [18,19] We have also found that in the incompressible and compressible regimes the elementary Bogolubov excitations, Eq. (19)(20)(21)(22), are better described in a variational basis by Eqs.…”

“…( 76). It must be mentioned that the difference between the predictions of the LHY approach and the density Monte Carlo formalisms are expected to increase as |a KRb | increases [19] taking the smallest values for −85a 0 < a KRb < −77a 0 whenever the coupling parameters a RbRb and a KK are similar to those mentioned in the former paragraph. As a first step in our calculations, the critical number of particles required to achieve self-trapping was found to be N (K) c ∼ 11000 which is close but slightly greater to the expectation N (K) homo = 18.65 × n (K) 0 ξ (a)3 = 10535 infrerred from the theoretical description of homo-nuclear mixtures.…”

“…Alternative formulations to that of LHY corresponds to performing quantum Monte Carlo [18] or density functional methods [12,19] to study dilute Bose-Bose mixtures of atoms with attractive interspecies and repulsive intraspecies interactions at T = 0. Such calculations have been reported for homo-nuclear mixtures considering diverse finite range interaction potentials.…”