论文标题
用短距离自旋交互的旋转挤压
Spin squeezing with short-range spin-exchange interactions
论文作者
论文摘要
我们在XXZ模型中研究了多体旋转挤压动力学，其交互作用以距离$ r $为$ 1/r^α$ in $ d = 2 $和$ 3 $空间尺寸。与Ising模型形成鲜明对比的是，我们发现了一个广泛的参数态度，即使相互作用短，$α> d $也可以实现与无限范围$α= 0 $限制相当的旋转挤压。一个“集体”行为的区域，其中最佳挤压随着系统大小而生长，一直延伸到最近邻邻互动的$α\至\ infty $限制。我们使用离散截短的Wigner近似（DTWA）做出的预测可在各种实验性冷原子，分子和光学平台中进行测试。
We investigate many-body spin squeezing dynamics in an XXZ model with interactions that fall off with distance $r$ as $1/r^α$ 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 $α=0$ limit is achievable even when interactions are short-ranged, $α>D$. A region of "collective" behavior in which optimal squeezing grows with system size extends all the way to the $α\to\infty$ 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.
