Rotational dynamics induced by low energy binary collisions of quantum droplets

Abstract

A theoretical analysis of the rotational dynamics induced by off axis binary collisions of quantum droplets constituted by ultracold atoms is reported. We focus on quantum droplets formed by degenerate dilute Bose gases made up from binary mixtures of alkaline atoms under feasible experimental conditions. The stability of the ground state is known to be longer for the chosen heteronuclear gases than for the homonuclear ones. In both cases, we find out that the dynamics seems to privilege a high similarity of the density of each atomic species. However, the evolution of the phase of the corresponding order parameter differs significantly for heteronuclear admixtures. We evaluate the fidelity as a figure of merit for the overlap between the order parameters of each atomic species. Dynamical evidence of the differences between the phase of the order parameters are predicted to manifest in their corresponding linear and angular momenta. We numerically verify that the total angular and linear momenta are conserved both during the collision. Some direct correlations between the Weber number and the impact parameter with the distribution of the dynamical variables are established.

arXiv comment12 pages, 6 figures

References in corpus (26)

• Quantum Mechanical Stabilization of a Collapsing Bose-Bose Mixture
• Quantum liquid droplets in a mixture of Bose-Einstein condensates
• Observation of quantum droplets in a strongly dipolar Bose gas
• Numerical Solution of the Gross-Pitaevskii Equation for Bose-Einstein Condensation
• Self-bound quantum droplets in atomic mixtures
• Self-bound droplets of a dilute magnetic quantum liquid
• Quantum-fluctuation-driven crossover from a dilute Bose-Einstein condensate to a macro-droplet in a dipolar quantum fluid
• Observation of a dipolar quantum gas with metastable supersolid properties
• Ultradilute low-dimensional liquids
• Observation of Quantum Droplets in a Heteronuclear Bosonic Mixture
• Collisions of self-bound quantum droplets
• Vortex solitons: Old results and new perspectives
• Two-dimensional vortex quantum droplets
• Three-dimensional droplets of swirling superfluids
• Dilute dipolar quantum droplets beyond the extended Gross-Pitaevskii equation
• Rotating binary Bose-Einstein condensates and vortex clusters in quantum droplets
• Metastability of quantum droplet clusters
• Lee-Huang-Yang effects in the ultracold mixture of ${}^{23}$Na and ${}^{87}$Rb with attractive interspecies interactions
• Ultradilute quantum liquid drops
• Self-bound ultra dilute Bose mixtures within Local Density Approximation
• The variational approximation for two-dimensional quantum droplets
• Breathing mode in two-dimensional binary self-bound Bose gas droplets
• Structured hetero-symmetric quantum droplets
• Microscopic derivation of the extended Gross-Pitaevskii equation for quantum droplets in binary Bose mixtures
• Ground state and rotational properties of two-dimensional self-bound quantum droplets
• Weber number and the outcome of binary collisions between quantum droplets