Resonant control of elastic collisions in an optically trapped fermi gas of atoms.

@article{Loftus2002ResonantCO,
  title={Resonant control of elastic collisions in an optically trapped fermi gas of atoms.},
  author={Thomas H. Loftus and Cindy A. Regal and Christopher Ticknor and John L. Bohn and Deborah S. Jin},
  journal={Physical review letters},
  year={2002},
  volume={88 17},
  pages={
          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+/-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… 

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References

SHOWING 1-10 OF 21 REFERENCES
"J."
however (for it was the literal soul of the life of the Redeemer, John xv. io), is the peculiar token of fellowship with the Redeemer. That love to God (what is meant here is not God’s love to men)
Phys
  • Rev. Lett. 88, 040405
  • 2002
Phys
  • Rev. Lett. 87, 120406 (2001); M. L. Chiofalo, S. J. J. M. F. Kokkelmans, J. N. Milstein, and M. J. Holland, Phys. Rev. Lett. 88, 090402
  • 2002
Phys
  • Rev. Lett. 87, 173201
  • 2001
Phys
  • Rev. Lett. 86, 5409
  • 2001
Phys
  • Lett. A 285, 228
  • 2001
Phys
  • Rev. Lett. 86, 4211
  • 2001
Phys
  • Rev. A 63, 033603
  • 2001
Science 291
  • 2570
  • 2001
Phys
  • Rev. Lett. 85, 2717
  • 2000
...
1
2
3
...