Slow-light probe of Fermi pairing through an atom-molecule dark state

Details Slow-light probe of Fermi pairing through an atom-molecule dark state Slow-light probe of Fermi pairing through an atom-molecule dark state

2011-02-10

arxiv.org/abs/1102.2024v1

Physics

Condensed Matter

Quantum Gases

5 pages, 3 figures, submitted to PRA

Scientific paper

We consider the two-color photooassociation of a quantum degenerate atomic gas into ground-state diatomic molecules via a molecular dark state. This process can be described in terms of a lambda level scheme that is formally analogous to the situation in electromagnetically-induced transparency (EIT) in atomic systems, and therefore can result in slow light propagation. We show that the group velocity of the light field depends explicitly on whether the atoms are bosons or fermions, as well as on the existence or absence of a pairing gap in the case of fermions, so that the measurement of the group velocity realizes a non-destructive diagnosis of the atomic state and the pairing gap.

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