Perspectives of optical lattices with state-dependent tunneling in approaching quantum magnetism in the presence of the external harmonic trapping potential

摘要

We study theoretically potential advantages of two-component mixtures inoptical lattices with state-dependent tunneling for approachinglong-range-order phases and detecting easy-axis antiferromagnetic correlations.While we do not find additional advantages of mixtures with large hoppingimbalance for approaching quantum magnetism in a harmonic trap, it is shownthat a nonzero difference in hopping amplitudes remains highly important for aproper symmetry breaking in the pseudospin space for the single-site-resolutionimaging and can be advantageously used for a significant increase of thesignal-to-noise ratio and thus detecting long-range easy-axis antiferromagneticcorrelations in the corresponding experiments.