Evolution of Fermion Pairing from Three to Two Dimensions

被引：162
|
作者：
Sommer, Ariel T. [1 ]
Cheuk, Lawrence W.
Ku, Mark J. H.
Bakr, Waseem S.
Zwierlein, Martin W.
机构：
[1] MIT, Dept Phys, MIT Harvard Ctr Ultracold Atoms, Cambridge, MA 02139 USA
来源：
PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 04期
基金：
美国国家科学基金会;
关键词：
GASES;
D O I：
10.1103/PhysRevLett.108.045302
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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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