Manifestation of relative phase in dynamics of two interacting Bose-Bose droplets
Abstract
We study coherent dynamics of two interacting Bose-Bose droplets by means of the extended Gross-Pitaevskii equation. The relative motion of the droplets couples to the phases of their components. The dynamics can be understood in terms of the evolution of zero-energy modes recovering symmetries spontaneously broken by the mean-field solution. These are translational symmetry and two U(1) symmetries, associated with the phases of the droplets' two components. A phase-dependent interaction potential and double Josephson-junction equations are introduced to explain the observed variety of different scenarios of collision. We show that the evolution of the droplets is a macroscopic manifestation of the hidden dynamics of their phases. The occurrence of nondissipative drag between the two supercurrents (Andreev-Bashkin effect) is mentioned.
Keywords
Cite
@article{arxiv.2104.06895,
title = {Manifestation of relative phase in dynamics of two interacting Bose-Bose droplets},
author = {Maciej Pylak and Filip Gampel and Marcin Płodzień and Mariusz Gajda},
journal= {arXiv preprint arXiv:2104.06895},
year = {2022}
}