Critical velocity for superfluid flow across the BEC-BCS crossover

Abstract

Critical velocities have been observed in an ultracold superfluid Fermi gas throughout the BEC-BCS crossover. A pronounced peak of the critical velocity at unitarity demonstrates that superfluidity is most robust for resonant atomic interactions. Critical velocities were determined from the abrupt onset of dissipation when the velocity of a moving one dimensional optical lattice was varied. The dependence of the critical velocity on lattice depth and on the inhomogeneous density profile was studied.

References in corpus (19)

• Superfluid Fermi Gases with Large Scattering Length
• Evidence for a critical velocity in a Bose-Einstein condensed gas
• Equation of state of a Fermi gas in the BEC-BCS crossover: a quantum Monte Carlo study
• Observation of Phase Separation in a Strongly-Interacting Imbalanced Fermi Gas
• Landau and Dynamical Instabilities of the Superflow of Bose-Einstein Condensates in Optical Lattices
• Observation of Superfluid Flow in a Bose-Einstein Condensed Gas
• Evidence for Superfluidity of Ultracold Fermions in an Optical Lattice
• Thermodynamics of the BCS-BEC crossover
• Precise determination of ${}^6$Li cold collision parameters by radio-frequency spectroscopy on weakly bound molecules
• Asymmetric Two-component Fermion Systems in Strong Coupling
• Precision Measurements of Collective Oscillations in the BEC-BCS Crossover
• Collective mode of homogeneous superfluid Fermi gases in the BEC-BCS crossover
• Vortices in Superfluid Fermi Gases through the BEC to BCS Crossover
• Unstable regimes for a Bose-Einstein condensate in an optical lattice
• Superfluid-insulator transition in a moving system of interacting bosons
• The Josephson effect throughout the BCS-BEC crossover
• Damping of Bogoliubov Excitations in Optical Lattices
• Beyond the Landau Criterion for Superfluidity
• Instability of a superfluid Bose gas induced by a locked thermal gas in an optical lattice

Cited by in corpus (107)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• Hysteresis in a quantized, superfluid atomtronic circuit
• Driving phase slips in a superfluid atom circuit with a rotating weak link
• A Mixture of Bose and Fermi Superfluids
• BCS-BEC Crossover and the Unitary Fermi Gas
• The BCS-BEC crossover: From ultra-cold Fermi gases to nuclear systems
• Roadmap on Atomtronics: State of the art and perspective
• Superfluid behaviour of a two-dimensional Bose gas
• Josephson effect in fermionic superfluids across the BEC-BCS crossover
• Two-terminal transport measurements with cold atoms
• Roton-Maxon Excitation Spectrum of Bose Condensates in a Shaken Optical Lattice
• Giant formation rates of ultracold molecules via Feshbach Optimized Photoassociation
• Observing the Drop of Resistance in the Flow of a Superfluid Fermi Gas
• Critical Velocity and Dissipation of an ultracold Bose-Fermi Counterflow
• The critical velocity in the BEC-BCS crossover
• Connecting dissipation and phase slips in a Josephson junction between fermionic superfluids
• Quantized Superfluid Vortex Rings in the Unitary Fermi Gas
• Threshold for creating excitations in a stirred superfluid ring
• Kibble-Zurek universality in a strongly interacting Fermi superfluid
• Resistance in Superconductors
• Excitation Spectrum and Superfluid Gap of an Ultracold Fermi Gas
• Contact and sum-rules in a near-uniform Fermi gas at unitarity
• DC Josephson Effect with Fermi gases in the Bose-Einstein regime
• Anisotropic Superfluid Behavior of a Dipolar Bose-Einstein Condensate
• Pseudogaps in strongly interacting Fermi gases
• Spin Transport in Polaronic and Superfluid Fermi Gases
• Macroscopic Periodic Tunneling of Fermi Atoms in the BCS-BEC Crossover
• Critical velocity of superfluid flow through single barrier and periodic potentials
• Wave pattern induced by a localized obstacle in the flow of a one-dimensional polariton condensate
• Drag force on an impurity below the superfluid critical velocity in a quasi-one-dimensional Bose-Einstein condensate
• Observation of superfluidity in a strongly correlated two-dimensional Fermi gas
• Superfluid Fermi atomic gas as a quantum simulator for the study of neutron-star equation of state
• Comparison of Different Pairing Fluctuation Approaches to BCS-BEC Crossover
• Transport in Floquet-Bloch bands
• BCS-BEC crossover in a random external potential
• The Landau critical velocity for a particle in a Fermi superfluid
• Critical Vortex Shedding in a Strongly Interacting Fermionic Superfluid
• Second sound and the density response function in uniform superfluid atomic gases
• Optomechanical signature of a frictionless flow of superfluid light
• Collective modes and superflow instabilities of strongly correlated Fermi superfluids
• Triangular Bose-Hubbard trimer as a minimal model for a superfluid circuit
• Critical Josephson current in BCS-BEC crossover superfluids
• Equation for the superfluid gap obtained by coarse graining the Bogoliubov-de Gennes equations throughout the BCS-BEC crossover
• Stability of Superflow for Ultracold Fermions in Optical Lattices
• Absence of heating in a uniform Fermi gas created by periodic driving
• Superfluidity and relaxation dynamics of a laser-stirred 2D Bose gas
• Second sound in 2D Bose gas: from the weakly interacting to the strongly interacting regime
• Transitions and excitations in a superfluid stream passing small impurities
• Critical velocity of flowing supersolids of dipolar Bose gases in optical lattices
• Equation of state and effective mass of the unitary Fermi gas in a 1D periodic potential
• Swallowtail Band Structure of the Superfluid Fermi Gas in an Optical Lattice
• Josephson oscillation of a superfluid Fermi gas
• Nonlinear Phenomena of Ultracold Atomic Gases in Optical Lattices: Emergence of Novel Features in Extended States
• Dissipation Mechanisms in Fermionic Josephson Junction
• Dissipative Dynamics of Quantum Vortices in Fermionic Superfluid
• Superfluidity of a laser-stirred Bose-Einstein condensate
• Instability of superfluid Fermi gases induced by a roton-like density mode in optical lattices
• Fano resonance through Higgs bound states in tunneling of Nambu-Goldstone modes
• Role reversal in first and second sound in a relativistic superfluid
• Spontaneous Radiation and Amplification of Kelvin Waves on Quantized Vortices in Bose-Einstein Condensates
• Josephson effect at finite temperature along the BCS-BEC crossover
• Collective modes and superfluidity of a two-dimensional ultracold Bose gas
• Dimensional crossover in a strongly interacting ultracold atomic Fermi gas
• Unruh effect in vacua with anisotropic scaling: Applications to multilayer graphene
• Sound propagation in a two-dimensional Bose gas across the superfluid transition
• Stripe Formation in Fermionic Atoms on 2-D Optical Lattice inside a Box Trap: DMRG Studies for Repulsive Hubbard Model with Open Boundary Condition
• Gapless neutron superfluidity can explain the late time cooling of transiently accreting neutron stars
• Effects of periodic potentials on the critical velocity of superfluid Fermi gases in the BCS-BEC crossover
• Thermodynamical approaches to efficient sympathetic cooling in ultracold Fermi-Bose atomic mixtures
• Critical velocity of a two-dimensional superflow past a potential barrier of arbitrary penetrability
• Superfluidity of Dirac Fermions in a Tunable Honeycomb Lattice: Cooper Pairing, Collective Modes, and Critical Currents
• Dipole oscillations of fermionic superfluids along the BEC-BCS crossover in disordered potentials
• Unitarity in periodic potentials: a renormalization group analysis
• Vortex core states in superfluid Fermi-Fermi mixtures with unequal masses
• Thermally activated phase slips of one-dimensional Bose gases in shallow optical lattices
• Fast Converging Path Integrals for Time-Dependent Potentials I: Recursive Calculation of Short-Time Expansion of the Propagator
• Fast Converging Path Integrals for Time-Dependent Potentials II: Generalization to Many-body Systems and Real-Time Formalism
• Observation of Optomechanical Strain in a Cold Atomic Cloud
• Tunneling properties of a bound pair of Fermi atoms in an optical lattice
• Josephson effect as signature of electron-hole superfluidity in bilayers of van der Waals heterostructures
• Flow-Induced Charge Modulation in Superfluid Atomic Fermions Loaded into an Optical Kagome Lattice
• Effect of Disorder in BCS-BEC Crossover
• Aspects of Superfluid Cold Atomic Gases in Optical Lattices
• Critical velocity for superfluidity in the one-dimensional mean-field regime: From matter to light quantum fluids
• Multiple period states of the superfluid Fermi gas in an optical lattice
• Critical velocity of a clean one-dimensional superconductor
• Gapless neutron superfluidity in the crust of the accreting neutron stars KS 1731-260 and MXB 1659-29
• Superfluid/ferromagnet/superfluid junction and $\pi$-phase in a superfluid Fermi gas
• Moving perturbation in a one-dimensional Fermi gas
• Stability of superfluid Fermi gases in optical lattices
• Collective excitation and stability of flow-induced gapless Fermi superfluids
• Tuning Dissipation and Excitations in Superfluid Fermi Gases with a Moving Impurity
• Landau Instability and soliton formation
• Pseudospin and spin-spin interactions in ultra-cold alkali atoms
• Critical Velocity in a Bose Gas in a Moving Optical Lattice at Finite Temperatures
• Critical velocity of antiferromagnetic spin-1 Bose-Einstein condensates at finite temperature
• Stability of condensate in superconductors
• Coherent and dissipative transport in a Josephson junction between fermionic superfluids of ${}^6$Li atoms
• Hydrodynamic spectrum of a superfluid in an elongated trap
• Landau instability and mobility edges of the interacting one-dimensional Bose gas in weak random potentials
• SNS Junctions along the BCS-BEC Crossover
• Superfluids in Polymer Quantum Mechanics
• Paraxial fluid of light in hot atomic vapors
• Resonant superfluidity in the Rabi-coupled spin-dependent Fermi-Hubbard model
• Condensation of quasiparticles and density modulation beyond the superfluid critical velocity
• Appropriate conditions to realize a $p$-wave superfluid state starting from a spin-orbit coupled $s$-wave superfluid Fermi gas