Critical thermalization of a disordered dipolar spin system in diamond

Department of Physics, Harvard University, Cambridge, MA 02138, USA School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA Department of Physics, Stanford University, Stanford, California 94305, USA Sumitomo Electric Industries Ltd., Itami, Hyougo, 664-0016, Japan Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan Research Centre for Knowledge Communities University of Tsukuba, Tsukuba, Ibaraki 305-8550, Japan Institut für Quantenoptik, Universität Ulm, 89081 Ulm, Germany Department of Physics, University of California Berkeley, Berkeley, California 94720, USA