Derivation of hydrodynamics for the gapless mode in the BEC-BCS crossover from the exact one-loop effective action
arXiv:cond-mat/0606243 · doi:10.1103/PhysRevLett.98.020603
Abstract
We show that many hydrodynamical properties of the BEC/BCS crossover in the presence of a Feshbach resonance at T=0 can be derived easily from the derivative expansion of the (exact) fully renormalized one-loop effective action. In particular, we calculate the velocity of sound throughout the BCS and BEC regimes and derive the generalized superfluid continuity equations for the composite two-fluid system.
arXiv commentFour pages, 1 figure. Whereas v.2 contained additional references, but was otherwise unchanged, this new version contains new material concerning our ability to provide a hydrodynamical description of the BEC/BSC system. This explains the change of title. Our old results are unaffected
References in corpus (21)
- Observation of resonance condensation of fermionic atom pairs
- Condensation of Pairs of Fermionic Atoms Near a Feshbach Resonance
- Observation of a Strongly-Interacting Degenerate Fermi Gas of Atoms
- Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
- BCS-BEC Crossover: From High Temperature Superconductors to Ultracold Superfluids
- Equation of state of a Fermi gas in the BEC-BCS crossover: a quantum Monte Carlo study
- Resonance superfluidity in a quantum degenerate Fermi gas
- The BCS-BEC Crossover in a Gas of Fermi Atoms with a Feshbach Resonance
- Universal Thermodynamics of Degenerate Quantum Gases in the Unitarity Limit
- Prospect of creating a composite fermi/bose superfluid
- Superfluidity and collective modes in a uniform gas of Fermi atoms with a Feshbach resonance
- From the Bogoliubov-de Gennes equations for superfluid fermions to the Gross-Pitaevskii equation for condensed bosons
- Resonance theory of the crossover from Bardeen-Cooper-Schrieffer superfluidity to Bose-Einstein condensation in a dilute Fermi gas
- The Nature of Superfluidity in Ultracold Fermi Gases Near Feshbach Resonances
- Effective Lagrangians for BCS Superconductors at T=0
- Effective action for Superconductors and BCS-Bose crossover
- Universality in Phase Transitions for Ultracold Fermionic Atoms
- Dressed Feshbach molecules in the BEC-BCS crossover
- Finite Temperature Time-Dependent Effective Theory For The Goldstone Field In A BCS-Type Superfluid
- Atom-molecule theory of broad Feshbach resonances
- Dynamics of T=0 BCS condensates
Cited by in corpus (9)
- Effective theory for the Goldstone field in the BCS-BEC crossover at T=0
- The role of Causality in Tunable Fermi Gas Condensates
- The Non-universal behaviour of Cold Fermi Condensates with Narrow Feshbach Resonances
- U_e(1)xU_g(1) Actions in 2+1-Dimensions: Full Vectorial Electric and Magnetic Fields
- Spontaneous Vortex Production in Driven Condensates with Narrow Feshbach Resonances
- From Narrow to Broad Feshbach Resonances: Condensate Fraction of Cooper Pairs and Preformed Molecules
- Tunneling electro-conductance of atomic Bose condensates
- Post-adiabatic Hamiltonian for low-energy excitations in a slowly time-dependent BCS-BEC crossover
- Nonequilibrium Damping of Collective Motion of Homogeneous Cold Fermi Condensates with Feshbach Resonances