Entanglement and extreme spin squeezing
Entanglement and extreme spin squeezing
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DOI：
10.1103/physrevlett.86.4431
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发表时间：
2001-05-14
影响因子：
8.6
通讯作者：
Molmer, K
中科院分区：
文献类型：
--
作者：
Sorensen, AS;Molmer, K
对于自旋矢量笛卡尔分量的任何平均值，我们在任何正交分量中确定最小可能的不确定性。相应的状态是光谱学和原子钟的最佳状态。我们证明了不同自旋J的结果可以用来识别纠缠和量化多粒子系统中的纠缠深度。通过本文开发的程序，粒子系综上的集体自旋测量可以用作多粒子纠缠的实验证明。
For any mean value of a Cartesian component of a spin vector we identify the smallest possible uncertainty in any of the orthogonal components. The corresponding states are optimal for spectroscopy and atomic clocks. We show that the results for different spin J can be used to identify entanglement and to quantify the depth of entanglement in systems with many particles. With the procedure developed in this Letter, collective spin measurements on an ensemble of particles can be used as an experimental proof of multiparticle entanglement.