Title | Orbital angular momentum dynamics of Bose-Einstein condensates trapped in two stacked rings |
Publication Type | Journal Article |
Year of Publication | 2020 |
Authors | Eulàlia, N, Mompart, J, Juliá-Díaz, B, Ahufinger, V |
Journal | Physical Review A |
Volume | 102 |
Start Page | 023331 |
Abstract | We investigate the stability and dynamics of the orbital angular momentum modes of a repulsive Bose-Einstein condensate trapped in two tunnel-coupled rings in a stack configuration. Within mean-field theory, we derive a two-state model for the system in the case in which we populate both rings equally with a single orbital angular momentum mode and include small perturbations in other modes. Analyzing the fixed-point solutions of the model and the associated classical Hamiltonian, we characterize the destabilization of the stationary states and the subsequent dynamics. By populating a single orbital angular momentum mode with an arbitrary population imbalance between the rings, we derive analytically the boundary between the regimes of Josephson oscillations and macroscopic quantum self-trapping and study numerically the stability of these solutions. |
URL | https://link.aps.org/doi/10.1103/PhysRevA.102.023331 |
DOI | 10.1103/PhysRevA.102.023331 |
