Probing fermionic condensates by fast-sweep projection onto Feshbach molecules.
Fast-sweep projection onto Feshbach molecules has been widely used as a probe of fermionic condensates. By determining the exact dynamics of a pair of atoms in time-varying magnetic fields, we calculate the number of condensed and noncondensed molecules created after fast magnetic field sweeps from the BCS to the Bose-Einstein condensate side of the resonances in 40K and 6Li, for different sweep rates and a range of initial and final fields. We discuss the relation between the initial fermionic condensate fraction and the molecular condensate fraction measured after the sweep.
Matyjaśkiewicz
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Department of Physics, King's College London, London WC2R 2LS, United Kingdom.
Szymańska
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Góral
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