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Detection of Spatial Correlations in an Ultracold Gas of Fermions

2004; American Physical Society; Volume: 92; Issue: 15 Linguagem: Inglês

10.1103/physrevlett.92.150405

1092-0145

Markus Greiner, C. A. Regal, Christopher Ticknor, John L. Bohn, D. S. Jin,

Atomic and Subatomic Physics Research

Spatial correlations are observed in an ultracold gas of fermionic atoms close to a Feshbach resonance. The correlations are detected by inducing spin-changing rf transitions between pairs of atoms. We observe the process in the strongly interacting regime for attractive as well as for repulsive atom-atom interactions and both in the regime of high and low quantum degeneracy. The observations are compared with a two-particle model that provides theoretical predictions for the measured rf transition rates.