Engineering Superfluidity in Bose-Fermi Mixtures of Ultracold Atoms

Abstract

We investigate many-body phase diagrams of atomic boson-fermion mixtures loaded in the two-dimensional optical lattice. Bosons mediate an attractive, finite-range interaction between fermions, leading to fermion pairing phases of different orbital symmetries. Specifically, we show that by properly tuning atomic and lattice parameters it is possible to create superfluids with $s$-, $p$-, and d-wave pairing symmetry as well as spin and charge density wave phases. These phases and their stability are analyzed within the mean-field approximation for systems of ${}^{40}$K-${}^{87}$Rb and ${}^{40}$K-${}^{23}$Na mixtures. For the experimentally accessible regime of parameters, superfluids with unconventional fermion pairing have transition temperature around a percent of the Fermi energy.

Revised version with a new paragraph for system preparation

References in corpus (5)

• Observation of Bose-Einstein Condensation of Molecules
• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Spatial quantum noise interferometry in expanding ultracold atom clouds
• Mixtures of Bosonic and Fermionic Atoms in Optical Lattices
• High-Temperature Atomic Superfluidity in Lattice Boson-Fermion Mixtures

Cited by in corpus (23)

• Many-Body Physics with Ultracold Gases
• Localization of bosonic atoms by fermionic impurities in a 3d optical lattice
• Species-specific optical lattices
• Rotation of quantum impurities in the presence of a many-body environment
• Cold Atoms and Molecules in Self-Assembled Dipolar Lattices
• Majorana modes and $p$-wave superfluids for fermionic atoms in optical lattices
• Heteronuclear molecules in an optical lattice: Theory and experiment
• Competing Orders in two-dimensional Bose-Fermi mixtures
• Supersolidity of cold-atom Bose-Fermi mixtures in optical lattices
• Strong coupling theory for the superfluidity of Bose-Fermi mixtures
• Pairing and density-wave phases in Boson-Fermion mixtures at fixed filling
• Interactions mediated by atoms, photons, electrons, and excitons
• Competing Superconducting States for Ultracold Atoms in Optical Lattices with Artificial Staggered Magnetic Field
• Collective excitations of a Bose-Einstein condensate of hard-core bosons and their mediated interactions: from two-body bound states to mediated superfluidity
• Coulomb drag of excitons in Bose-Fermi mixtures
• Superfluid-Insulator Transition and Fermion Pairing in Bose-Fermi Mixtures
• Generating coherent phonon waves in narrow-band materials: a twisted bilayer graphene phaser
• Thermodynamical approaches to efficient sympathetic cooling in ultracold Fermi-Bose atomic mixtures
• Phases of Bosons or Fermions in confined optical lattices
• Correlated Phases of Population Imbalanced Fermi-Fermi Mixtures on an Optical Lattice
• Bose-Fermi solid and its quantum melting in an one-dimensional optical lattice
• Heteronuclear quantum gas mixtures
• Quantum Monte Carlo and perturbative study of two-dimensional Bose-Fermi mixtures