Self-localized state and solitons in a Bose-Einstein-condensate-impurity mixture at finite temperature
arXiv:1407.6214 · doi:10.1103/PhysRevA.90.013628
Abstract
We study the properties of a Bose-Einstein condensate (BEC)-impurity mixture at finite temperature employing the time dependent Hartree-Fock Bogoliubov (TDHFB) theory which is a set of coupled nonlinear equations of motion for the condensate and its normal and anomalous fluctuations on the one hand, and for impurity on the other. The numerical solutions of these equations in the static quasi-1D regime show that the thermal cloud and the anomalous density are deformed as happens to the condensate and the impurity becomes less localized at nonzero temperatures. Effects of the BEC fluctuations on the self-trapping state are studied in homogeneous weakly interacting BEC-impurity at low temperature. The self-trapping threshold is also determined in such a system. The formation of solitons in the BEC-impurity mixture at finite temperature is investigated. Our formalism shows several new pictures.
8 pages, 3 figures
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- Polaron Problems in Ultracold Atoms: Role of a Fermi Sea across Different Spatial Dimensions and Quantum Fluctuations of a Bose Medium
- Quench Dynamics of the Ideal Bose Polaron at Zero and Nonzero Temperatures
- Many-body and temperature effects in two-dimensional quantum droplets in Bose-Bose mixtures
- Breathing modes of repulsive polarons in Bose-Bose mixtures
- Angular self-localization of impurities rotating in a bosonic bath
- Collective excitations of a dilute Bose gas at finite temperature: TDHFB Theory
- Weakly interacting Bose gases with generalized uncertainty principle: Effects of quantum gravity