TY - JOUR AU - S. Lepoutre AU - Johannas Schachenmayer AU - Lucas Gabardos AU - Bihui Zhu AU - B. Naylor AU - E. MarĂ©chal AU - O. Gorceix AU - Ana Maria Rey AU - Laurent Vernac AU - Bruno Laburthe-Tolra AB - Understanding quantum thermalization through entanglement build\ up in isolated quantum systems addresses fundamental questions on how unitary dynamics connects to statistical physics. Spin systems made of long-range interacting atoms offer an ideal experimental platform to investigate this question. Here, we study the spin dynamics and approach towards local thermal equilibrium of a macroscopic ensemble of S = 3 chromium atoms pinned in a three dimensional optical lattice and prepared in a pure coherent spin state, under the effect of magnetic dipole-dipole interactions. Our isolated system thermalizes under its own dynamics, reaching a steady state consistent with a thermal ensemble with a temperature dictated from the system's energy. The build up of quantum correlations during the dynamics is supported by comparison with an improved numerical quantum phase-space method. Our observations are consistent with a scenario of quantum thermalization linked to the growth of entanglement entropy. BT - Nature Communications DA - 2019-04 DO - 10.1038/s41467-019-09699-5 N2 - Understanding quantum thermalization through entanglement build\ up in isolated quantum systems addresses fundamental questions on how unitary dynamics connects to statistical physics. Spin systems made of long-range interacting atoms offer an ideal experimental platform to investigate this question. Here, we study the spin dynamics and approach towards local thermal equilibrium of a macroscopic ensemble of S = 3 chromium atoms pinned in a three dimensional optical lattice and prepared in a pure coherent spin state, under the effect of magnetic dipole-dipole interactions. Our isolated system thermalizes under its own dynamics, reaching a steady state consistent with a thermal ensemble with a temperature dictated from the system's energy. The build up of quantum correlations during the dynamics is supported by comparison with an improved numerical quantum phase-space method. Our observations are consistent with a scenario of quantum thermalization linked to the growth of entanglement entropy. PY - 2019 SE - 1714 EP - 1714 T2 - Nature Communications TI - Exploring out-of-equilibrium quantum magnetism and thermalization in a spin-3 many-body dipolar lattice system UR - https://www.nature.com/articles/s41467-019-09699-5$\#$Abs1 VL - 10 ER -