Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.045302
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Funding
- DARPA OLE
- David and Lucile Packard Foundation
- Alfred P. Sloan Foundation
- NSF
- AFOSR-MURI
- ARO-MURI
- ONR
- DARPA YFA
- Army Research Office
- Division Of Physics
- Direct For Mathematical & Physical Scien [0959057] Funding Source: National Science Foundation
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We follow the evolution of fermion pairing in the dimensional crossover from three-dimensional to two-dimensional as a strongly interacting Fermi gas of Li-6 atoms becomes confined to a stack of two-dimensional layers formed by a one-dimensional optical lattice. Decreasing the dimensionality leads to the opening of a gap in radio-frequency spectra, even on the Bardeen-Cooper-Schrieffer side of a Feshbach resonance. The measured binding energy of fermion pairs closely follows the theoretical two-body binding energy and, in the two-dimensional limit, the zero-temperature mean-field Bose-Einstein-condensation to Bardeen-Cooper-Schrieffer crossover theory.
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