Breathing modes of repulsive polarons in Bose-Bose mixtures
arXiv:2006.09771 · doi:10.1088/1361-648X/ab997a
Abstract
We consider impurity atoms embedded in a two-component Bose-Einstein condensate in a quasi-one dimensional regime. We study the effects of repulsive coupling between the impurities and Bose species on the equilibrium of the system for both miscible and immiscible mixtures by numerically solving the underlying coupled Gross-Pitaevskii equations. Our results reveal that the presence of impurities may lead to a miscible-immiscible phase transition due to the interaction of the impurities and the two condensates. Within the realm of the Bogoliubov-de Gennes equations we calculate the quantum fluctuations due to the different types of interactions. The breathing modes and the time evolution of harmonically trapped impurities in both homogeneous and inhomogeneous binary condensates are deeply discussed in the miscible case using variational and numerical means. We show in particular that the self-trapping, the miscibility and the inhomogeneity of the trapped Bose mixture may strongly modify the low-lying excitations and the dynamical properties of impurities. The presence of phonons in the homogeneous Bose mixture gives rise to the damping of breathing oscillations of impurities width.
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Cited by in corpus (11)
- An impurity in a heteronuclear two-component Bose mixture
- Polarons and their induced interactions in highly imbalanced triple mixtures
- Pattern formation in one-dimensional polaron systems and temporal orthogonality catastrophe
- Bose-Bose mixtures in a weak-disorder potential: Fluctuations and superfluidity
- Quantum information flow in impurity qubits interacting with Bose-Bose mixtures
- Entangling lattice-trapped bosons with a free impurity: impact on stationary and dynamical properties
- Polarons in Binary Bose-Einstein Condensates
- Effective approaches to the dynamical properties of two distinguishable Bose polarons
- Moving Bose mixtures with dipole-dipole interactions
- Phase diagram of two-component mean-field Bose mixtures
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