Diffusion in a system of a few distinguishable fermions in a one-dimensional double-well potential

Abstract

Dynamical properties of a few ultra-cold fermions confined in a double-well potential is studied. We show that the dynamics, which is governed by single-particle tunnelings for vanishing interactions, is completely different for strong interactions. Depending on the details of the configuration, for sufficiently strong interactions (repulsions or attractions) the particle flow through the barrier can be accelerated or slowed down. This effect cannot be explained with the single-particle picture. It is clarified with direct inspection to the spectrum of the few-body Hamiltonian.

Authors' version accepted in EPL

References in corpus (10)

• Many-Body Physics with Ultracold Gases
• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Non-standard Hubbard models in optical lattices: a review
• Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms
• Two Fermions in a double well: Exploring a fundamental building block of the Hubbard model
• Dynamics of a tunable superfluid junction
• Speckle Imaging of Spin Fluctuations in a Strongly Interacting Fermi Gas
• Pairing in a system of a few attractive fermions in a harmonic trap
• Pairing of few Fermi atoms in one dimension
• Small mass- and trap-imbalanced two-component Fermi systems

Cited by in corpus (14)

• One-dimensional mixtures of several ultracold atoms: a review
• Few strongly interacting ultracold fermions in one-dimensional traps of different shapes
• Correlated Tunneling Dynamics of an Ultracold Fermi-Fermi Mixture Confined in a Double-Well
• Coherent Oscillations in Small Fermi Polaron Systems
• Infinite Barriers and Symmetries for a Few Trapped Particles in One Dimension
• Effective three-body interactions for bosons in a double-well confinement
• Dynamics of spin and density fluctuations in strongly interacting few-body systems
• Signatures of quantum chaos in low-energy mixtures of few fermions
• Interplay of phase separation and itinerant magnetism for correlated few fermions in a double-well
• Nonequilibrium noise as a probe of pair-tunneling transport in the BCS--BEC Crossover
• Interaction-controlled impurity transport in trapped mixtures of ultracold bosons
• Dynamical properties of a few mass-imbalanced ultra-cold fermions confined in a double-well potential
• Emergence of junction dynamics in a strongly interacting Bose mixture
• Dynamical resistivity of a few interacting fermions to the time-dependent potential barrier