Long-lived driven solid-state quantum memory

Jianming Cai*, Fedor Jelezko, Nadav Katz, Alex Retzker, Martin B. Plenio

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


We investigate the performance of inhomogeneously broadened spin ensembles as quantum memories under continuous dynamical decoupling. The role of the continuous driving field is twofold: firstly, it decouples individual spins from magnetic noise; secondly, and more importantly, 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 considerably enhance the decay of the tails of the inhomogeneous broadening distribution. 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-the-art experimental parameters.

Original languageAmerican English
Article number093030
JournalNew Journal of Physics
StatePublished - Sep 2012


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