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Observation of Collective Atomic Recoil Motion in a Degenerate Fermion Gas



Lu Deng, Edward W. Hagley


We demonstrate collective atomic recoil motion with a dilute, ultracold, degenerate fermion gas in a single spin state. By utilizing an adiabatically decompressed magnetic trap with an aspect ratio different from that of the initial trap, a momentum-squeezed fermion cloud is achieved.With a single pump pulse of the proper polarization, we observe, for the first time, multiple wave-mixing processes that result in distinct collective atomic recoil motion modes in a degenerate fermion cloud. Contrary to the case with Bose condensates, no pump-laser detuning asymmetry is present.
Physical Review Letters


fermion gas, light scattering by quantum gas


Deng, L. and Hagley, E. (2011), Observation of Collective Atomic Recoil Motion in a Degenerate Fermion Gas, Physical Review Letters, [online], (Accessed July 14, 2024)


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Created May 23, 2011, Updated November 10, 2018