Kangara J, Cheng Chingyun, Pegahan S, Arakelyan I, Thomas J E
Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
Department of Physics, Duke University, Durham, North Carolina 27708, USA.
Phys Rev Lett. 2018 Feb 23;120(8):083203. doi: 10.1103/PhysRevLett.120.083203.
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)PRLTAO0031-900710.1103/PhysRevLett.95.060402] to a bichromatic 1D lattice with nonzero 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.
我们使用射频光谱学研究了处于可调谐双阱势一维晶格中的费米子配对。光谱揭示了具有不同对称性的两种原子对的共存。我们的测量结果与一个理论模型在数量上高度吻合，该理论模型是通过将奥尔索等人 [《物理评论快报》95, 060402 (2005年)；PRLTAO0031 - 9007；10.1103/PhysRevLett.95.060402] 的格林函数方法扩展到具有非零谐波径向限制的双色一维晶格而获得的。预测的光谱包含数百个离散跃迁，具有与对称性相关的初始态布居数和跃迁强度。我们的工作为理解超晶格中的基本配对态提供了依据，为强相互作用多体系统的新研究铺平了道路。
