Spin squeezing with short-range spin-exchange interactions

• URL: http://arxiv.org/abs/2006.00723v3
• Date: Sat, 12 Sep 2020 17:35:04 GMT
• Title: Spin squeezing with short-range spin-exchange interactions
• Authors: Michael A. Perlin and Chunlei Qu and Ana Maria Rey
• Abstract summary: We investigate many-body spin squeezing dynamics in an XXZ model with interactions that fall off with distance $r$ as $1/ralpha$ in $D=2$ and $3$ spatial dimensions. A region of "collective" behavior in which optimal squeezing grows with system size extends all the way to the $alphatoinfty$ limit of nearest-neighbor interactions.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate many-body spin squeezing dynamics in an XXZ model with interactions that fall off with distance $r$ as $1/r^\alpha$ in $D=2$ and $3$ spatial dimensions. In stark contrast to the Ising model, we find a broad parameter regime where spin squeezing comparable to the infinite-range $\alpha=0$ limit is achievable even when interactions are short-ranged, $\alpha>D$. A region of "collective" behavior in which optimal squeezing grows with system size extends all the way to the $\alpha\to\infty$ limit of nearest-neighbor interactions. Our predictions, made using the discrete truncated Wigner approximation (DTWA), are testable in a variety of experimental cold atomic, molecular, and optical platforms.

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