Josephson effect in superfluid atomic Fermi-gases
arXiv:cond-mat/0204376 · doi:10.1103/PhysRevA.66.041603
Abstract
We consider an analog of the internal Josephson effect in superfluid atomic Fermi-gases. Four different hyperfine states of the atoms are assumed to be trapped and to form two superfluids via the BCS-type pairing. Weshow that Josephson oscillations can be realized by coupling the superfluids with two laser fields. Choosing the laser detunings in a suitable way leads to an asymmetric below-gap tunneling effect for which there exists no analogue in the context of solid-state superconductivity.
4 pages, 2 figures