The internal Josephson effect in a Fermi gas near a Feshbach resonance
arXiv:cond-mat/0404125 · doi:10.1103/PhysRevA.72.013612
Abstract
We consider a two-component system of Fermi atoms and molecular bosons in the vicinity of a Feshbash resonance. We derive an effective action for the system, which has a term describing coherent tunneling of the molecular bosons into Cooper pairs and vice versa. In the equilibrium state, global phase coherence may be destroyed by thermal or quantum phase fluctuations. In the non-equilibrium regime, the system may show an internal AC Josephson effect leading to real time oscillations in the number of molecular bosons.
arXiv comment5 pages, 2 figures
References in corpus (21)
- Observation of resonance condensation of fermionic atom pairs
- Condensation of Pairs of Fermionic Atoms Near a Feshbach Resonance
- Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
- Experimental Study of the BEC-BCS Crossover Region in Lithium 6
- Creation of ultracold molecules from a Fermi gas of atoms
- Evidence for Superfluidity in a Resonantly Interacting Fermi Gas
- Atom--Molecule Coherence in a Bose-Einstein Condensate
- Resonance superfluidity in a quantum degenerate Fermi gas
- The BCS-BEC Crossover in a Gas of Fermi Atoms with a Feshbach Resonance
- Measurements of Relative Phase in Binary Mixtures of Bose-Einstein Condensates
- Measurement of positive and negative scattering lengths in a Fermi gas of atoms
- Atom-molecule coherence in Bose gases
- Superfluidity and collective modes in a uniform gas of Fermi atoms with a Feshbach resonance
- Lifetime of molecule-atom mixtures near a Feshbach resonance in 40K
- The Nature of Superfluidity in Ultracold Fermi Gases Near Feshbach Resonances
- Signatures of resonance superfluidity in a quantum Fermi gas
- Cooper Pairing in Ultracold K-40 Using Feshbach Resonances
- Feshbach resonances with large background scattering length: interplay with open-channel resonances
- Atom-molecule coexistence and collective dynamics near a Feshbach resonance of cold fermions
- Crossover temperature of Bose-Einstein condensation in an atomic Fermi gas
- Broad versus narrow Fano-Feshbach resonances in the BCS-BEC crossover with trapped Fermi atom