Resonant Control of Elastic Collisions in an Optically Trapped Fermi Gas of Atoms
T Loftus, C A. Regal, J L. Ticknor, J L. Bohn, Deborah S. Jin
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 Fesh-bach 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 1.4 G and has a width of 8.0 1.1 G. Using this resonance, we have changed the elastic collision cross section in the gas by nearly 3 orders of magnitude.
Physical Review Letters
Fermi gas, optical trap, ultracold atoms
, Regal, C.
, Ticknor, J.
, Bohn, J.
and Jin, D.
Resonant Control of Elastic Collisions in an Optically Trapped Fermi Gas of Atoms, Physical Review Letters
(Accessed December 2, 2023)