Abstract
We describe a novel approach to prepare, detect, and characterize magnetic quantum phases in ultracold spinor atoms loaded in optical superlattices. Our technique makes use of singlet-triplet spin manipulations in an array of isolated double-well potentials in analogy to recently demonstrated control in quantum dots. We also discuss the many-body singlet-triplet spin dynamics arising from coherent coupling between nearest neighbor double wells and derive an effective description for such systems. We use it to study the generation of complex magnetic states by adiabatic and nonequilibrium dynamics.
Highlights
We describe a novel approach to prepare, detect and characterize magnetic quantum phases in ultra-cold spinor atoms loaded in optical superlattices
In this Letter we describe a new approach for preparation and probing of many-body magnetic quantum states that makes use of coherent manipulation of singlet-triplet pairs of ultra-cold atoms loaded in deep period-two optical superlattices
We further study the many-body dynamics that emerge when tunneling between nearest neighbor double wells is allowed
Summary
We describe a novel approach to prepare, detect and characterize magnetic quantum phases in ultra-cold spinor atoms loaded in optical superlattices. In this Letter we describe a new approach for preparation and probing of many-body magnetic quantum states that makes use of coherent manipulation of singlet-triplet pairs of ultra-cold atoms loaded in deep period-two optical superlattices. We discuss the use of our projection technique to probe the density of spin defects (kinks) in magnetic states prepared via equilibrium and non-equilibrium dynamics.
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