Renormalization group study of Bose polarons
arXiv:2105.10801 · doi:10.1103/PhysRevA.104.023317
Abstract
We study the properties of a single impurity in a dilute Bose gas, a Bose polaron, using the functional renormalization group. We use an ansatz for the effective action motivated by a derivative expansion, and we compute the energies of the attractive and repulsive branches of excitations in both two and three spatial dimensions. Three-body correlations play an important role in the attractive branch, and we account for those by including three-body couplings between two bath bosons and the impurity. Our calculations compare very favorably with state-of-the-art experimental measurements and numerical simulations.
17 pages, 15 figures; Accepted version
References in corpus (33)
- Many-Body Physics with Ultracold Gases
- Exact evolution equation for the effective potential
- Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms
- Repulsive Fermi polarons in a resonant mixture of ultracold Li atoms
- Observation of scale invariance and universality in two-dimensional Bose gases
- Superfluid behaviour of a two-dimensional Bose gas
- Excitation spectra and rf-response near the polaron-to-molecule transition from the functional renormalization group
- Variational study of polarons in Bose-Einstein condensates
- Universal Properties of Two-Dimensional Boson Droplets
- The Bose polaron problem: effect of mass imbalance on binding energy
- Observation of coherent multiorbital polarons in a two-dimensional Fermi gas
- From local to critical fluctuations in lattice models: a non-perturbative renormalization-group approach
- Strongly Interacting Two-Dimensional Bose Gases
- Particle-hole fluctuations in the BCS-BEC Crossover
- Stability and breakdown of Fermi polarons in a strongly interacting Fermi-Bose mixture
- Non-perturbative renormalization-group approach to the Bose-Hubbard model
- Universal aspects of a strongly interacting impurity in a dilute Bose condensate
- Functional renormalization for Bose-Einstein Condensation
- Functional renormalization for quantum phase transitions with non-relativistic bosons
- Universal thermodynamics of a two-dimensional Bose gas
- Finite-temperature behavior of the Bose polaron
- Fate of the Bose polaron at finite temperature
- Infrared behavior and spectral function of a Bose superfluid at zero temperature
- Efimov effect from functional renormalization
- Quantum behavior of a heavy impurity strongly coupled to a Bose gas
- Functional renormalization for trion formation in ultracold fermion gases
- Phase structure of spin-imbalanced unitary Fermi gases
- Superfluid Bose gas in two dimensions
- Low-energy potential scattering in two and three dimensions
- Functional renormalisation group for two-body scattering
- Dynamical formation of polarons in a Bose-Einstein condensate: A variational approach
- Topological transport of mobile impurities
- Functional renormalization for repulsive Bose-Bose mixtures at zero temperature
Cited by in corpus (19)
- Heavy polarons in ultracold atomic Fermi superfluids at the BEC-BCS crossover: formalism and applications
- Exact quasiparticle properties of a heavy polaron in BCS Fermi superfluids
- Crossover polarons in a strongly interacting Fermi superfluid
- Superconductivity induced by strong electron-exciton coupling in doped atomically thin semiconductor heterostructures
- Mobile impurities interacting with a few one-dimensional lattice bosons
- Multidimensional Spectroscopy of Time-Dependent Impurities in Ultracold Fermions
- Polaron-Depleton Transition in the Yrast Excitations of a One-Dimensional Bose Gas with a Mobile Impurity
- Variational approach to the two-dimensional Bose polaron
- Weakly-interacting Bose-Bose mixtures from the functional renormalisation group
- Disorder in order: Localization without randomness in a cold atom system
- Momentum-dependent quasiparticle properties of the Fermi polaron from the functional renormalization group
- Temperature-induced miscibility of impurities in trapped Bose gases
- Polarons in Binary Bose-Einstein Condensates
- Functional renormalisation group approach to the finite-temperature Bose polaron
- Repulsive Fermi and Bose Polarons in Quantum Gases
- Linear rotor in an ideal Bose gas near the threshold for binding
- Polaronic neutron in dilute alpha matter: A -wave Bose polaron
- Weak and strong coupling polarons in binary Bose-Einstein condensates
- Phenomenological model of decaying Bose polarons