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arXiv · 1110.3058

Evolution of Fermion Pairing from Three to Two Dimensions

Ariel T. Sommer·Lawrence W. Cheuk·Mark Jen-Hao Ku·Waseem S. Bakr·Martin W. Zwierlein
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Abstract

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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Ariel T. Sommer, Lawrence W. Cheuk, Mark Jen-Hao Ku, Waseem S. Bakr, Martin W. Zwierlein. 2012-01-18. Evolution of Fermion Pairing from Three to Two Dimensions. https://doi.org/10.1103/physrevlett.108.045302

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