title: Suppressing Spectral Diffusion of Emitted Photons with Optical Pulses.
abstract: In many quantum architectures the solid-state qubits, such as quantum dots or color centers, are interfaced via emitted photons. However, the frequency of photons emitted by solid-state systems exhibits slow uncontrollable fluctuations over time (spectral diffusion), creating a serious problem for implementation of the photon-mediated protocols. Here we show that a sequence of optical pulses applied to the solid-state emitter can stabilize the emission line at the desired frequency. We demonstrate efficiency, robustness, and feasibility of the method analytically and numerically. Taking nitrogen-vacancy center in diamond as an example, we show that only several pulses, with the width of 1 ns, separated by few ns (which is not difficult to achieve) can suppress spectral diffusion. Our method provides a simple and robust way to greatly improve the efficiency of photon-mediated entanglement and/or coupling to photonic cavities for solid-state qubits.
authors: Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.
authors: H F
authors: HF
authors: Fotso
authors: Department of Physics, Northeastern University, Boston, Massachusetts 02115, USA.
authors: A E
authors: AE
authors: Feiguin
authors: Institute for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, USA.
authors: D D
authors: DD
authors: Awschalom
authors: Ames Laboratory US DOE, Ames, Iowa 50011, USA.
authors: V V
authors: VV
authors: Dobrovitski