Optical response of a superfluid state in dilute atomic Fermi-Dirac gases
- 1 September 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 60 (3) , R1775-R1778
- https://doi.org/10.1103/physreva.60.r1775
Abstract
We theoretically study the propagation of light in a Fermi-Dirac gas in the presence of a superfluid state. BCS pairing between atoms in different spin levels increases the optical linewidth and line shift of a quantum degenerate Fermi-Dirac gas already at very low densities and introduces a collisional local-field shift that may dramatically dominate the Lorentz-Lorenz shift. These optical properties could possibly signal the presence of the superfluid state and determine the value of the BCS order parameter.Keywords
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