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.

References in corpus (3)

• Strong Coupling of a Spin Ensemble to a Superconducting Resonator
• Quantum Memories. A Review based on the European Integrated Project "Qubit Applications (QAP)"
• Spectroscopic properties of inhomogeneously broadened spin ensembles in a cavity

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