Counterflow of lattice polarons in harmonically confined optical lattices
arXiv:2502.09448 · doi:10.1103/9ch1-dnvc
Abstract
We study a mobile impurity in a one-dimensional harmonically confined optical lattice interacting repulsively with a bosonic bath. The behavior of the impurity across baths with superfluid and Mott-insulator domains is examined, including its full back-action effect on the bath. We characterize the bath-impurity phase diagram and reveal the appearance of a correlated counterflow phase, which we support with an analytical model for a mobile impurity-hole pair. This phase shows an extended combined insulator domain of unity filling but no independent domain of constant density. The transition to this phase features a sudden orthogonality and the change of the shape of the impurity's profile to that of a free particle in an infinite square well. The findings of this work suggest the appearance of unconventional counterflow in trapped imbalanced atomic mixtures.
10 pages, 6 figures
References in corpus (23)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- The density-matrix renormalization group in the age of matrix product states
- The ITensor Software Library for Tensor Network Calculations
- Observation of Fermi Polarons in a Tunable Fermi Liquid of Ultracold Atoms
- Quantum mixtures of ultracold gases of neutral atoms
- Coherent and dephasing spectroscopy for single-impurity probing of an ultracold bath
- Induced pairing of fermionic impurities in a one-dimensional strongly correlated Bose gas
- Lattice polarons across the superfluid to Mott insulator transition
- Canonical Trajectories and Critical Coupling of the Bose-Hubbard Hamiltonian in a Harmonic Trap
- Polarons and bipolarons in a two-dimensional square lattice
- Interactions mediated by atoms, photons, electrons, and excitons
- Observation of counterflow superfluidity in a two-component Mott insulator
- Quantum droplets with particle imbalance in one-dimensional optical lattices
- Mobile impurities interacting with a few one-dimensional lattice bosons
- Radiofrequency spectroscopy of one-dimensional trapped Bose polarons: crossover from the adiabatic to the diabatic regime
- Intersections of ultracold atomic polarons and nuclear clusters: How is a chart of nuclides modified in dilute neutron matter?
- Collective excitations of a Bose-Einstein condensate of hard-core bosons and their mediated interactions: from two-body bound states to mediated superfluidity
- Impurity dephasing in a Bose-Hubbard model
- Bound impurities in a one-dimensional Bose lattice gas: low-energy properties and quench-induced dynamics
- Magnetic Phase Transition in the Ground-State Phase Diagram of Binary Bose Gases in Optical Lattices
- Temperature-induced miscibility of impurities in trapped Bose gases
- Emergent Mott-insulators at non-integer fillings and devil's staircase induced by attractive interaction in many-body polarons
- Few particles with an impurity in a one-dimensional harmonic trap