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.
- Publication:
-
Physical Review Research
- Pub Date:
- March 2022
- DOI:
- 10.1103/PhysRevResearch.4.013168
- arXiv:
- arXiv:2104.06895
- Bibcode:
- 2022PhRvR...4a3168P
- Keywords:
-
- Condensed Matter - Quantum Gases
- E-Print:
- Phys. Rev. Research 4, 013168 (2022)