Finite-temperature behavior of the Bose polaron

Abstract

We consider a mobile impurity immersed in a Bose gas at finite temperature. Using perturbation theory valid for weak coupling between the impurity and the bosons, we derive analytical results for the energy and damping of the impurity for low and high temperatures, as well as for temperatures close to the critical temperature $T_c$ for Bose-Einstein condensation. These results show that the properties of the impurity vary strongly with temperature. In particular, the energy exhibits a non-monotonic behavior close to $T_c$, and the damping rises sharply close to $T_c$. We argue that this behaviour is generic for impurities immersed in an environment undergoing a phase transition that breaks a continuous symmetry. Finally, we discuss how these effects can be detected experimentally.

arXiv comment10 pages and 6 figures

References in corpus (27)

• Feshbach Resonances in Ultracold Gases
• Correlated Electrons in High Temperature Superconductors
• Polaron percolation in diluted magnetic semiconductors
• Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms
• Theory of the Weakly Interacting Bose Gas
• Metastability and Coherence of Repulsive Polarons in a Strongly Interacting Fermi Mixture
• Observation of Attractive and Repulsive Polarons in a Bose-Einstein Condensate
• Attractive and repulsive Fermi polarons in two dimensions
• Bose polarons in the strongly interacting regime
• Universal phase diagram of a strongly interacting Fermi gas with unbalanced spin populations
• Polarons, Dressed Molecules, and Itinerant Ferromagnetism in ultracold Fermi gases
• Fermi-Polaron: Diagrammatic Monte Carlo for Divergent Sign-Alternating Series
• Field-theoretical study of the Bose polaron
• Impurity in a Bose-Einstein condensate and the Efimov effect
• Quantum dynamics of ultracold Bose polarons
• Polaron to molecule transition in a strongly imbalanced Fermi gas
• Quasiparticle properties of a mobile impurity in a Bose-Einstein condensate
• Stability of a Fully Magnetized Ferromagnetic state in Repulsively Interacting Ultracold Fermi Gases
• A mesoscopic Rydberg impurity in an atomic quantum gas
• Repulsive polarons and itinerant ferromagnetism in strongly polarized Fermi gases
• Strong coupling Bose polarons in a BEC
• Ground state of a tightly bound composite dimer immersed in a Fermi Sea
• Bose polarons at finite temperature and strong coupling
• Analytical theory of the dressed bound state in highly polarized Fermi gases
• Polarons in Ultracold Fermi Superfluids
• Self-localized state and solitons in a Bose-Einstein-condensate-impurity mixture at finite temperature
• Diagrammatic calculation of energy spectrum of quantum impurity in degenerate Bose-Einstein condensate

Cited by in corpus (39)

• Bose polarons near quantum criticality
• Analyzing a Bose polaron across resonant interactions
• Bose polarons at finite temperature and strong coupling
• Landau Effective Interaction between Quasiparticles in a Bose-Einstein Condensate
• Real-space dynamics of attractive and repulsive polarons in Bose-Einstein condensates
• Mobile impurity in a Bose-Einstein condensate and the orthogonality catastrophe
• Quantum spin dynamics of individual neutral impurities coupled to a Bose-Einstein condensate
• Universal aspects of a strongly interacting impurity in a dilute Bose condensate
• Fate of the Bose polaron at finite temperature
• Variational approach for impurity dynamics at finite temperature
• Strong coupling Bose polarons in a two-dimensional gas
• Strong coupling Bose polarons out of equilibrium: Dynamical RG approach
• Dynamical variational approach to Bose polarons at finite temperatures
• Quantum dynamics of Bose-polaron in a $d$-dimensional Bose Einstein condensate
• Quench Dynamics of the Ideal Bose Polaron at Zero and Nonzero Temperatures
• Renormalization group study of Bose polarons
• Breakdown of the Fermi polaron description near Fermi degeneracy at unitarity
• Mean-field study of repulsive 2D and 3D Bose polarons
• Pump Probe Spectroscopy of Bose Polarons: Dynamical Formation and Coherence
• Polarons and bipolarons in a two-dimensional square lattice
• Interactions mediated by atoms, photons, electrons, and excitons
• Polaron in the dilute critical Bose condensate
• Polaron in dilute 2D Bose gas at low temperatures
• Bose polaron in spherical trap potentials: Spatial structure and quantum depletion
• Breathing modes of repulsive polarons in Bose-Bose mixtures
• Role of thermal two-phonon scattering for impurity dynamics in a low-dimensional BEC
• Medium-induced Interaction Between Impurities in a Bose-Einstein Condensate
• Fermi polaron in low-density spin-polarized neutron matter
• Impurity in a three-dimensional unitary Bose gas
• Dynamics of polaron formation in 1D Bose gases in the strong-coupling regime
• Effects of quantum fluctuations on the dynamics of dipolar Bose polarons
• Weakly-interacting Bose-Bose mixtures from the functional renormalisation group
• Quantum Cherenkov transition of finite momentum Bose polarons
• Bose polaron in spherically symmetric trap potentials: Ground states with zero and lower angular momenta
• Polaritons for testing the universality of an impurity in a Bose-Einstein condensate
• Functional renormalisation group approach to the finite-temperature Bose polaron
• Polaronic dressing of bound states
• Optical response of the supersolid polaron
• Quasiparticle nature of the Bose polaron at finite temperature