Long-lived driven solid-state quantum memory
Abstract
We investigate the performance of inhomogeneously broadened spin ensembles as quantum memories under continuous dynamical decoupling. The role of the continuous driving field is two-fold: first, it decouples individual spins from magnetic noise; second and more important, it suppresses and reshapes the spectral inhomogeneity of spin ensembles. We show that a continuous driving field, which itself may also be inhomogeneous over the ensemble, can enhance the decay of the tails of the inhomogeneous broadening distribution considerably. This fact enables a spin ensemble based quantum memory to exploit the effect of cavity protection and achieve a much longer storage time. In particular, for a spin ensemble with a Lorentzian spectral distribution, our calculations demonstrate that continuous dynamical decoupling has the potential to improve its storage time by orders of magnitude for the state-of-art experimental parameters.
Cite
@article{arxiv.1206.4430,
title = {Long-lived driven solid-state quantum memory},
author = {J. -M. Cai and F. Jelezko and N. Katz and A. Retzker and M. B. Plenio},
journal= {arXiv preprint arXiv:1206.4430},
year = {2015}
}