Evolution of Fermion Pairing from Three to Two Dimensions

Details Evolution of Fermion Pairing from Three to Two Dimensions Evolution of Fermion Pairing from Three to Two Dimensions

2011-10-13

arxiv.org/abs/1110.3058v2

Phys. Rev. Lett. 108, 045302 (2012)

Physics

Condensed Matter

Quantum Gases

5 pages, 4 figures

Scientific paper

We follow the evolution of fermion pairing in the dimensional crossover from 3D to 2D as a strongly interacting Fermi gas of $^6$Li 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 BCS-side of a Feshbach resonance. The measured binding energy of fermion pairs closely follows the theoretical two-body binding energy and, in the 2D limit, the zero-temperature mean-field BEC-BCS theory.

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