



01507nas a2200145   4500008004100000245007200041210006900113260001500182520103700197100002301234700001901257700002501276700002301301856003701324       2016                        eng d00aEntanglement and spin-squeezing without infinite-range interactions0 aEntanglement and spinsqueezing without infiniterange interaction  c2016/12/223 a<p>Infinite-range interactions are known to facilitate the production of highly entangled states with applications in quantum information and metrology. However, many experimental systems have interactions that decay with distance, and the achievable benefits in this context are much less clear. Combining recent exact solutions with a controlled expansion in the system size, we analyze quench dynamics in Ising models with power-law (1/r α ) interactions in D dimensions, thereby expanding the understanding of spin squeezing into a broad and experimentally relevant context. In spatially homogeneous systems, we show that for small α the scaling of squeezing with system size is identical to the infinite-range (α = 0) case. This indifference to the interaction range persists up to a critical value α = 2D/3, above which squeezing degrades continuously. Boundaryinduced inhomogeneities present in most experimental systems modify this picture, but it nevertheless remains qualitatively correct for finite-sized systems.</p>1 aFoss-Feig, Michael1 aGong, Zhe-Xuan1 aGorshkov, Alexey, V.1 aClark, Charles, W.  uhttps://arxiv.org/abs/1612.07805