All-optical pump-and-probe detection of two-time correlations in a Fermi gas
| Autor: | Tung-Lam Dao, Corinna Kollath, Michael M. Kohl, Iacopo Carusotto |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Optical lattice Condensed matter physics 7. Clean energy 01 natural sciences Measure (mathematics) Atomic and Molecular Physics and Optics 010305 fluids & plasmas Pulse (physics) Atomic coherence Superfluidity Ultracold atom 0103 physical sciences Quasiparticle Atomic physics 010306 general physics Fermi gas |
| Zdroj: | Physical Review A. 81 |
| ISSN: | 1094-1622 1050-2947 |
| DOI: | 10.1103/physreva.81.043626 |
| Popis: | We propose an all-optical scheme to probe the dynamical correlations of a strongly interacting gas of ultracold atoms in an optical lattice potential. The proposed technique is based on a pump-and-probe scheme: a coherent light pulse is initially converted into an atomic coherence and later retrieved after a variable storage time. The efficiency of the proposed method to measure the two-time one-particle Green function of the gas is validated by numerical and analytical calculations of the expected signal for the two cases of a normal Fermi gas and a BCS superfluid state. Protocols to extract the superfluid gap and the full quasiparticle dispersions are discussed. |
| Databáze: | OpenAIRE |
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