Physics – Condensed Matter – Quantum Gases
Scientific paper
2010-09-23
Phys. Rev. A 82, 061605(R) (2010)
Physics
Condensed Matter
Quantum Gases
5 pages and 4 figures; published version in Physical Review A (as a Rapid Communication)
Scientific paper
10.1103/PhysRevA.82.061605
Theoretical predictions for the dynamic structure factor of a harmonically trapped Fermi superfluid near the BEC-BCS crossover are compared with recent Bragg spectroscopy measurements at large transferred momenta. The calculations are based on a random-phase (or time-dependent Hartree-Fock-Gorkov) approximation generalized to the strongly interacting regime. Excellent agreement with experimental spectra at low temperatures is obtained, with no free parameters. Theoretical predictions for zero-temperature static structure factor are also found to agree well with the experimental results and independent theoretical calculations based on the exact Tan relations. The temperature dependence of the structure factors at unitarity is predicted.
Hu Hui
Kuhnle Eva D.
Vale Chris J.
Zou Peng
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