Efficiency of fermionic quantum distillation
arXiv:1707.01792 · doi:10.1103/PhysRevA.96.033617
Abstract
We present a time-dependent density-matrix renormalization group investigation of the quantum distillation process within the Fermi--Hubbard model on a quasi-1D ladder geometry. The term distillation refers to the dynamical, spatial separation of singlons and doublons in the sudden expansion of interacting particles in an optical lattice, i.e., the release of a cloud of atoms from a trapping potential. Remarkably, quantum distillation can lead to a contraction of the doublon cloud, resulting in an increased density of the doublons in the core region compared to the initial state. As a main result, we show that this phenomenon is not limited to chains that were previously studied. Interestingly, there are additional dynamical processes on the two-leg ladder such as density oscillations and selftrapping of defects that lead to a less efficient distillation process. An investigation of the time evolution starting from product states provides an explanation for this behaviour. Initial product states are also considered, since in optical lattice experiments such states are often used as the initial setup. We propose configurations that lead to a fast and efficient quantum distillation.
References in corpus (34)
- The density-matrix renormalization group in the age of matrix product states
- Real time evolution using the density matrix renormalization group
- Non-equilibrium coherence dynamics in one-dimensional Bose gases
- Repulsively bound atom pairs in an optical lattice
- Quench dynamics and non equilibrium phase diagram of the Bose-Hubbard model
- Interaction Quench in the Hubbard model
- Dynamical phase transition in correlated fermionic lattice systems
- Strongly Correlated Quantum Walks in Optical Lattices
- Observation of antiferromagnetic correlations in the Hubbard model with ultracold atoms
- A Quantum Gas Microscope for Fermionic Atoms
- Ultracold atoms out of equilibrium
- Synthetic dimensions and spin-orbit coupling with an optical clock transition
- Spin-orbit coupled fermions in an optical lattice clock
- Exact coherent states of a harmonically confined Tonks-Girardeau gas
- Cooling in strongly correlated optical lattices: prospects and challenges
- Two-particle states in the Hubbard model
- Fermionization in an expanding 1D gas of hard-core bosons
- Metastable superfluidity of repulsive fermionic atoms in optical lattices
- Emergence of quasi-condensates of hard-core bosons at finite momentum
- Quantum liquid of repulsively bound pairs of particles in a lattice
- Quantum distillation: dynamical generation of low-entropy states of strongly correlated fermions in an optical lattice
- Scattering resonances and two-particle bound states of the extended Hubbard model
- Long-time behavior of the momentum distribution during the sudden expansion of a spin-imbalanced Fermi gas in one dimension
- Free expansion of impenetrable bosons on one-dimensional optical lattices
- Sudden Expansion of a One-Dimensional Bose Gas from Power-Law Traps
- Statistics-dependent quantum co-walking of two particles in one-dimensional lattices with nearest-neighbor interactions
- Ground-state reference systems for expanding correlated fermions in one dimension
- Edge-localized states in quantum one-dimensional lattices
- Relaxation dynamics of a Fermi gas in an optical superlattice
- Emergent ultrafast phenomena in correlated oxides and heterostructures
- Bound states and expansion dynamics of interacting bosons on a one-dimensional lattice
- Temporal decay of Neel order in the one-dimensional Fermi-Hubbard model
- Filling-dependent doublon dynamics in the one-dimensional Hubbard model
- Strongly Interacting Atom Lasers in Three Dimensional Optical Lattices