论文标题
相互作用的偶极s = 3原子的密集3D阵列的集体磁化松弛
Relaxation of the collective magnetization of a dense 3D array of interacting dipolar S=3 atoms
论文作者
论文摘要
我们报告了在偶极相互作用的效果下，在几乎单位填充的晶格系统中的集体旋转长度（总磁化）和旋转种群的测量值进行了测量。观察到的自旋种群动力学不受自旋回波的使用影响，并且与S = 3 XXZ自旋模型的数值模拟完全一致。相反，观察到的旋转长度比模拟中的衰减慢，并且在最长的时间尺度内达到了一个小但非零的渐近值。我们的发现表明，自旋连贯性是对影响量子多体行为的系统效应的敏感探针，而量子行为无法仅通过测量旋转种群来诊断。
We report on measurements of the dynamics of the collective spin length (total magnetization) and spin populations in an almost unit filled lattice system comprising about 10^4 spin S=3 chromium atoms, under the effect of dipolar interactions. The observed spin population dynamics is unaffected by the use of a spin echo, and fully consistent with numerical simulations of the S=3 XXZ spin model. On the contrary, the observed spin length decays slower than in simulations, and surprisingly reaches a small but nonzero asymptotic value within the longest timescale. Our findings show that spin coherences are sensitive probes to systematic effects affecting quantum many-body behavior that cannot be diagnosed by merely measuring spin populations.
