Condensed Matter Seminar - Dr. Denis Candido, Department of Physics & Astronomy, The University of Iowa "Suppression of the optical linewidth and spin decoherence of a quantum spin center in a p–n diode"
Meeting ID: 931 1146 7821
Speaker: Dr. Denis Candido, Department of Physics & Astronomy, The University of Iowa
Title: Suppression of the optical linewidth and spin decoherence of a quantum spin center in a p–n diode
Abstract: We present  a quantitative theory of the suppression of the optical linewidth due to charge fluctuation noise in a p–n diode, recently observed in Ref. 2. We connect the local electric field with the voltage across the diode, allowing for the identification of the defect depth from the experimental threshold voltage. Furthermore, we show that an accurate description of the decoherence of such spin centers requires a complete spin–1 formalism that yields a bi-exponential decoherence process, and predict how reduced charge fluctuation noise suppresses the spin center's decoherence rate.
The material is based on work supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Award Number DE-SC0019250.
 Denis R. Candido and Michael E. Flatté, arXiv:2008.13289
 C. P. Anderson, A. Bourassa et al., Science 366, 1225 (2019)