Non-equilibrium dynamics and atom-pair coherence in strongly interacting Bose-Fermi mixtures
arXiv:2407.09176 · doi:10.1103/PhysRevResearch.6.043016
Abstract
Theoretical treatments of non-equilibrium dynamics in strongly interacting Bose-Fermi mixtures are complicated by the inherent non-Gaussian nature of the vacuum two-body physics, invalidating the typical Hartree-Fock-Bogoliubov approximation. Here, we apply the cumulant expansion to study non-equilibrium Bose-Fermi mixtures, which allows us to explicitly include the missing non-Gaussian quantum correlations, leading to a consistent dynamical theory of a Bose-Fermi mixture near an interspecies Feshbach resonance. We first apply our theory to a study of atom-pair coherence in the gas, which is significantly enhanced by the competing influences of the Fermi sea and Bose-Einstein condensation, in agreement with analytical calculations. Then, we study the depletion of a degenerate Bose-Fermi mixture following a quench to the unitary regime, characterizing the resulting depletion of the Bose-Einstein condensate, the deformation of the Fermi surface, and the production of molecules. We find that at early times, the population dynamics scale quadratically with the hold time, and define an associated characteristic timescale set by the parameters of the mixture and the width of the Feshbach resonance.
14 pages, 11 figures
References in corpus (66)
- Feshbach Resonances in Ultracold Gases
- Atom--Molecule Coherence in a Bose-Einstein Condensate
- Resonantly-paired fermionic superfluids
- Observation of Heteronuclear Feshbach Resonances in a Bose-Fermi Mixture
- Influence of Induced Interactions on the Superfluid Transition in Dilute Fermi Gases
- A Mixture of Bose and Fermi Superfluids
- Observation of Feshbach resonances between two different atomic species
- Universal dynamics of a degenerate unitary Bose gas
- Three-boson problem near a narrow Feshbach resonance
- QCD thermalization: Ab initio approaches and interdisciplinary connections
- Zero-temperature phase diagram of binary boson-fermion mixtures
- General relations for quantum gases in two and three dimensions. Two-component fermions
- Impurity in a Bose-Einstein condensate and the Efimov effect
- Resonance Superfluidity: Renormalization of Resonance Scattering Theory
- Universal Prethermal Dynamics of Bose Gases Quenched to Unitarity
- Ramsey fringes in a Bose-Einstein condensate between atoms and molecules
- Non-equilibrium quantum dynamics and formation of the Bose polaron
- Fermion-Mediated Interactions Between Bosonic Atoms
- Two and Three-body Contacts in the Unitary Bose Gas
- Two-Element Mixture of Bose and Fermi Superfluids
- A microscopic quantum dynamics approach to the dilute condensed Bose gas
- Microscopic theory of atom-molecule oscillations in a Bose-Einstein condensate
- Ground-state properties of a dilute Bose-Fermi mixture
- Probing the Interface of a Phase-Separated State in a Repulsive Bose-Fermi Mixture
- Thermal excitation spectrum from entanglement in an expanding quantum string
- Dynamic projection on Feshbach molecules: a probe of pairing and phase fluctuations
- Quantum field theory of dilute homogeneous Bose-Fermi-mixtures at zero temperature: general formalismand beyond mean-field corrections
- Universal Scaling Laws in the Dynamics of a Homogeneous Unitary Bose Gas
- Mediated interactions between Fermi polarons and the role of impurity quantum statistics
- Observation of spin-spin fermion-mediated interactions between ultracold bosons
- Observation of Efimov molecules created from a resonantly interacting Bose gas
- Stability and breakdown of Fermi polarons in a strongly interacting Fermi-Bose mixture
- Collective Modes in a Dilute Bose-Fermi Mixture
- Pairing and condensation in a resonant Bose-Fermi mixture
- Induced interactions in a superfluid Bose-Fermi mixture
- Mass imbalance effect in resonant Bose-Fermi mixtures
- Bose-Fermi Pair Correlations in Attractively Interacting Bose-Fermi Atomic Mixtures
- Phonon spectrum and dynamical stability of a quantum degenerate Bose-Fermi mixture
- Alternative Route to Strong Interaction: Narrow Feshbach Resonance
- Dynamics of three-body correlations in quenched unitary Bose gases
- Feshbach molecule formation in a Bose-Fermi mixture
- From Efimov Physics to the Bose Polaron using Gaussian States
- Life and death of the Bose polaron
- Correlated quantum dynamics of two quenched fermionic impurities immersed in a Bose-Einstein Condensate
- Bose-Einstein condensation of Efimovian triples in the unitary Bose gas
- Prethermalization to thermalization crossover in a dilute Bose gas following an interaction ramp
- Hyperbolic Bloch equations: atom-cluster kinetics of an interacting Bose gas
- Sound propagation in a Bose-Fermi mixture: from weak to strong interactions
- Cumulant theory of the unitary Bose gas: Prethermal and Efimovian dynamics
- Coherent Atom-Molecule Oscillations in a Bose-Fermi Mixture
- Generalized Mean Field Approach to a Resonant Bose-Fermi Mixture
- Stability of fermionic Feshbach molecules in a Bose-Fermi mixture
- Anomalous Dimers in Quantum Mixtures near Broad Resonances: Pauli Blocking, Fermi Surface Dynamics and Implications
- Breathing Mode of a Bose-Einstein Condensate Immersed in a Fermi Sea
- Resonant dynamics in boson-fermion mixtures
- Pair formation in quenched unitary Bose gases
- Strongly interacting Bose-Fermi mixture: mediated interaction, phase diagram and sound propagation
- Three in Many: Efimov physics in the presence of a Fermi sea
- Fermi-Bose Mixtures Near Broad Interspecies Feshbach Resonances
- Doublon dynamics of Bose-Fermi mixtures in optical lattices
- Thermodynamic stability, compressibility matrix, and effects of mediated interactions in a strongly-interacting Bose-Fermi mixture
- Collective dynamics of Fermi-Bose mixtures with an oscillating scattering length
- Bose-Fermi Mixtures Near an Interspecies Feshbach Resonance: Testing a Non Equilibrium Approach
- Evolution of the unitary Bose gas for broad to narrow Feshbach resonances
- Comment on "Fermi-Bose Mixtures near Broad Interspecies Feshbach Resonances"
- Resonance triplet dynamics in the quenched unitary Bose gas