Critical velocity for superfluid flow across the BEC-BCS crossover
arXiv:0707.2354 · doi:10.1103/PhysRevLett.99.070402
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 (6)
- Observation of Phase Separation in a Strongly-Interacting Imbalanced Fermi Gas
- Evidence for Superfluidity of Ultracold Fermions in an Optical Lattice
- Thermodynamics of the BCS-BEC crossover
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Cited by in corpus (17)
- Many-Body Physics with Ultracold Gases
- Theory of ultracold Fermi gases
- Giant formation rates of ultracold molecules via Feshbach Optimized Photoassociation
- DC Josephson Effect with Fermi gases in the Bose-Einstein regime
- Macroscopic Periodic Tunneling of Fermi Atoms in the BCS-BEC Crossover
- Critical velocity of superfluid flow through single barrier and periodic potentials
- BCS-BEC crossover in a random external potential
- Collective modes and superflow instabilities of strongly correlated Fermi superfluids
- Stability of Superflow for Ultracold Fermions in Optical Lattices
- Equation of state and effective mass of the unitary Fermi gas in a 1D periodic potential
- Josephson oscillation of a superfluid Fermi gas
- Stripe Formation in Fermionic Atoms on 2-D Optical Lattice inside a Box Trap: DMRG Studies for Repulsive Hubbard Model with Open Boundary Condition
- Vortex core states in superfluid Fermi-Fermi mixtures with unequal masses
- Thermodynamical approaches to efficient sympathetic cooling in ultracold Fermi-Bose atomic mixtures
- Tunneling properties of a bound pair of Fermi atoms in an optical lattice
- Critical velocity of a clean one-dimensional superconductor
- Stability of superfluid Fermi gases in optical lattices