Polaron in dilute 2D Bose gas at low temperatures
arXiv:1712.06978 · doi:10.1088/1361-6455/aacdcb
Abstract
The properties of a Bose polaron immersed in a dilute two-dimensional medium at finite temperatures are discussed. Assuming that the impurity is weakly-coupled to the bath particles we have perturbatively calculated the polaron energy, effective mass, quasiparticle residue and damping rate. The parameters of impurity spectrum are found to be well-defined in the whole temperature region whereas the pole structure of the impurity Green's function is visible only at absolute zero. At any finite temperatures the quasiparticle residue is logarithmically divergent signalling of the branch-cut behavior of the polaron propagator.
4+epsilon pages, 3 figures
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Cited by in corpus (14)
- Strong coupling Bose polarons in a two-dimensional gas
- Mixed bubbles in Bose-Bose mixtures
- Mean-field construction for spectrum of one-dimensional Bose polaron
- Quantum dynamics of Bose-polaron in a -dimensional Bose Einstein condensate
- Renormalization group study of Bose polarons
- Mean-field study of repulsive 2D and 3D Bose polarons
- Breathing modes of repulsive polarons in Bose-Bose mixtures
- Variational approach to the two-dimensional Bose polaron
- Mean-field properties of impurity in Bose gas with three-body forces
- Effects of quantum fluctuations on the dynamics of dipolar Bose polarons
- Weakly-interacting Bose-Bose mixtures from the functional renormalisation group
- Functional renormalisation group approach to the finite-temperature Bose polaron
- Flow-based Nonperturbative Simulation of First-order Phase Transitions
- Phenomenological model of decaying Bose polarons