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arXiv · 1709.08484

Atom Pairing in Optical Superlattices

J. Kangara·Chingyun Cheng·S. Pegahan·I. Arakelyan·J. E. Thomas
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Abstract

We study the pairing of fermions in a one-dimensional lattice of tunable double-well potentials using radio-frequency spectroscopy. The spectra reveal the coexistence of two types of atom pairs with different symmetries. Our measurements are in excellent quantitative agreement with a theoretical model, obtained by extending the Green's function method of Orso et al., [Phys. Rev. Lett. 95, 060402 (2005)], to a bichromatic 1D lattice with finite harmonic radial confinement. The predicted spectra comprise hundreds of discrete transitions, with symmetry-dependent initial state populations and transition strengths. Our work provides an understanding of the elementary pairing states in a superlattice, paving the way for new studies of strongly interacting many-body systems.

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J. Kangara, Chingyun Cheng, S. Pegahan, I. Arakelyan, J. E. Thomas. 2017-09-25. Atom Pairing in Optical Superlattices. https://doi.org/10.1103/physrevlett.120.083203

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