title: Depolarization Dynamics in a Strongly Interacting Solid-State Spin Ensemble.
abstract: We study the depolarization dynamics of a dense ensemble of dipolar interacting spins, associated with nitrogen-vacancy centers in diamond. We observe anomalously fast, density-dependent, and nonexponential spin relaxation. To explain these observations, we propose a microscopic model where an interplay of long-range interactions, disorder, and dissipation leads to predictions that are in quantitative agreement with both current and prior experimental results. Our results pave the way for controlled many-body experiments with long-lived and strongly interacting ensembles of solid-state spins.
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.|School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: Joonhee
authors.initials: J
authors.lastname: Choi
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: Soonwon
authors.initials: S
authors.lastname: Choi
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: Georg
authors.initials: G
authors.lastname: Kucsko
authors.affiliation: Department of Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: Peter C
authors.initials: PC
authors.lastname: Maurer
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: Brendan J
authors.initials: BJ
authors.lastname: Shields
authors.affiliation: Sumitomo Electric Industries Limited, Itami, Hyougo 664-0016, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Sumiya
authors.affiliation: Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan.
authors.forename: Shinobu
authors.initials: S
authors.lastname: Onoda
authors.affiliation: Research Centre for Knowledge Communities, University of Tsukuba, Tsukuba, Ibaraki 305-8550, Japan.
authors.forename: Junichi
authors.initials: J
authors.lastname: Isoya
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: Eugene
authors.initials: E
authors.lastname: Demler
authors.affiliation: Institut für Quantenoptik and Center for Integrated Quantum Science and Technology, Universität Ulm, 89081 Ulm, Germany.
authors.forename: Fedor
authors.initials: F
authors.lastname: Jelezko
authors.affiliation: Department of Physics, University of California Berkeley, Berkeley, California 94720, USA.
authors.forename: Norman Y
authors.initials: NY
authors.lastname: Yao
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: Mikhail D
authors.initials: MD
authors.lastname: Lukin