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arXiv · 2009.11438

St\"uckelberg interferometry using spin-orbit-coupled cold atoms in an optical lattice

Shuang Liang·Zheng-Chun Li·Weiping Zhang·Lu Zhou·Zhihao Lan
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Abstract

Time evolution of spin-orbit-coupled cold atoms in an optical lattice is studied, with a two-band energy spectrum having two avoided crossings. A force is applied such that the atoms experience two consecutive Landau-Zener tunnelings while transversing the avoided crossings. St\"uckelberg interference arises from the phase accumulated during the adiabatic evolution between the two tunnelings. This phase is gauge field-dependent and thus provides new opportunities to measure the synthetic gauge field, which is verified via calculation of spin transition probabilities after a double passage process. Time-dependent and time-averaged spin probabilities are derived, in which resonances are found. We also demonstrate chiral Bloch oscillation and rich spin-momentum locking behavior in this system.

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Shuang Liang, Zheng-Chun Li, Weiping Zhang, Lu Zhou, Zhihao Lan. 2020-09-24. St\"uckelberg interferometry using spin-orbit-coupled cold atoms in an optical lattice. https://doi.org/10.1103/physreva.102.033332

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