Abstract
Ultracold atoms with two hyperfine internal states in optical lattices are proposed to demonstrate a two-dimensional spin-$1/2$ model under a transverse effective staggered magnetic field. The transverse magnetic field is produced by a Raman process and can be modulated by the intensities of the additional light fields. This optical lattice protocol can investigate magnetic quantum phenomena induced by the effective staggered magnetic field in a wider parameter range with controllable interaction between the spins of the nearest-neighbor atoms.
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