Resonant control of elastic collisions in an optically trapped Fermi gas of atoms

Details Resonant control of elastic collisions in an optically trapped Fermi gas of atoms Resonant control of elastic collisions in an optically trapped Fermi gas of atoms

2001-11-29

arxiv.org/abs/cond-mat/0111571v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.88.173201

We have loaded an ultracold gas of fermionic atoms into a far off resonance optical dipole trap and precisely controlled the spin composition of the trapped gas. We have measured a magnetic-field Feshbach resonance between atoms in the two lowest energy spin-states, |9/2, -9/2> and |9/2, -7/2>. The resonance peaks at a magnetic field of 201.5 plus or minus 1.4 G and has a width of 8.0 plus or minus 1.1 G. Using this resonance we have changed the elastic collision cross section in the gas by nearly 3 orders of magnitude.

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