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Article overview
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Spin squeezing with short-range spin-exchange interactions | | Michael A. Perlin
; Chunlei Qu
; Ana Maria Rey
; | | Date: |
1 Jun 2020 | | 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 $alpha oinfty$ limit of
nearest-neighbor interactions, where achievable squeezing is primarily limited
by the coherence time of a system. We identify the boundary between collective
and Ising-limited squeezing behaviors with a dynamical phase transition between
regions of parametrically distinct entanglement growth. Our predictions are
testable in a variety of experimental cold atomic, molecular, and optical
platforms. | | Source: | arXiv, 2006.0723 | | Services: | Forum | Review | PDF | Favorites | |
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