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arXiv · 2005.13487

Relaxation of the collective magnetization of a dense 3D array of interacting dipolar S=3 atoms

Lucas Gabardos·Bihui Zhu·Steven Lepoutre·Ana Maria Rey·Bruno Laburthe-Tolra·Laurent Vernac
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Abstract

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.

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Lucas Gabardos, Bihui Zhu, Steven Lepoutre, Ana Maria Rey, Bruno Laburthe-Tolra, Laurent Vernac. 2020-05-27. Relaxation of the collective magnetization of a dense 3D array of interacting dipolar S=3 atoms. https://doi.org/10.1103/physrevlett.125.143401

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