Induced interactions and quench dynamics of bosonic impurities immersed in a Fermi sea

Abstract

We unravel the ground state properties and the non-equilibrium quantum dynamics of two bosonic impurities immersed in an one-dimensional fermionic environment by applying a quench of the impurity-medium interaction strength. In the ground state, the impurities and the Fermi sea are phase-separated for strong impurity-medium repulsions while they experience a localization tendency around the trap center for large attractions. We demonstrate the presence of attractive induced interactions mediated by the host for impurity-medium couplings of either sign and analyze the competition between induced and direct interactions. Following a quench to repulsive interactions triggers a breathing motion in both components, with an interaction dependent frequency and amplitude for the impurities, and a dynamical phase-separation between the impurities and their surrounding for strong repulsions. For attractive post-quench couplings a beating pattern owing its existence to the dominant role of induced interactions takes place with both components showing a localization trend around the trap center. In both quench scenarios, attractive induced correlations are manifested between non-interacting impurities and are found to dominate the direct ones only for quenches to attractive couplings.

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Cited by in corpus (14)

• Formation and quench of homonuclear and heteronuclear quantum droplets in one dimension
• Polaron Problems in Ultracold Atoms: Role of a Fermi Sea across Different Spatial Dimensions and Quantum Fluctuations of a Bose Medium
• Scattering of two heavy Fermi polarons: resonances and quasibound states
• Interactions mediated by atoms, photons, electrons, and excitons
• Counterflow dynamics of two correlated impurities immersed in a bosonic gas
• Pattern formation of correlated impurities subjected to an impurity-medium interaction pulse
• Polarizing the Medium: Fermion-Mediated Interactions between Bosons
• Finite-range effects in the two-dimensional repulsive Fermi polaron
• Entangling lattice-trapped bosons with a free impurity: impact on stationary and dynamical properties
• Intra- and interband excitations induced residue decay of the Bose polaron in a one-dimensional double-well
• Correlated decoherence and thermometry with mobile impurities in a 1D Fermi gas
• Sudden quench of harmonically trapped mass-imbalanced fermions
• Breathing dynamics of the Bose polaron in a species-selective harmonic trap
• Dynamical formation of two-fold fragmented many-body state induced by an impurity in a double-well