title: Probing dynamics of an electron-spin ensemble via a superconducting resonator.
abstract: We study spin relaxation and diffusion in an electron-spin ensemble of nitrogen impurities in diamond at low temperature (0.25-1.2 K) and polarizing magnetic field (80-300 mT). Measurements exploit field-controlled coupling of the ensemble to two modes of a transmission-line resonator. The observed temperature-independent spin relaxation time indicates that spin outdiffusion across the mode volume dominates over spin-lattice relaxation. Depolarization of one hyperfine-split subensemble by pumping of another indicates fast cross relaxation, with implications for the use of subensembles as independent quantum memories.
authors: Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, The Netherlands.
authors: V
authors: V
authors: Ranjan
authors: G
authors: G
authors: de Lange
authors: R
authors: R
authors: Schutjens
authors: T
authors: T
authors: Debelhoir
authors: J P
authors: JP
authors: Groen
authors: D
authors: D
authors: Szombati
authors: D J
authors: DJ
authors: Thoen
authors: T M
authors: TM
authors: Klapwijk
authors: R
authors: R
authors: Hanson
authors: L
authors: L
authors: DiCarlo