Abstract
In this paper, we study the orbital Feshbach resonance of an ultracold two-electron 173Yb Fermi gas in a one-dimensional optical lattice with the Raman coupling between two different nuclear spin states in a two-channel model, an open channel and a closed channel. We find that the Raman coupling strength can prevent formation of Cooper pairs and compress the system, compromising its superfluidity, while in the presence of a synthetic magnetic flux, the Raman laser can promote superfluidity by adjusting the interaction between Cooper pairs, especially for a large orbital Feshbach resonance detuning. Further, we show the significant consequences of the chiral edge current by introducing a synthetic two dimensional lattice. We find that the chiral edge currents vary periodically with the flux. We find that the chiral edge currents in the open channel case may change their directions versus the orbital Feshbach resonance detuning. In contrast, for a closed channel, the detuning merely supports the chiral edge current and the directions of the chiral currents do not change with the variation of the detuning, which means the chirality remains unchanged.
Published Version
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