Broadband, noise-free optical quantum memory with neutral nitrogen-vacancy centers in diamond

TL;DR

This paper proposes a broadband, noise-free quantum optical memory using the ground-state manifold of neutral nitrogen-vacancy centers in diamond, enabling high-efficiency photon storage at low temperatures.

Contribution

It introduces a novel solid-state quantum memory scheme based on NV centers' ground states, leveraging spin-orbit interactions and polarization rules for noise-free operation.

Findings

Potential for storing photons as short as tens of picoseconds.

Achievable storage duration of at least a few nanoseconds.

High-efficiency, noise-free photon storage at low temperature.

Abstract

It is proposed that the ground-state manifold of the neutral nitrogen-vacancy center in diamond could be used as a quantum two-level system in a solid-state-based implementation of a broadband, noise-free quantum optical memory. The proposal is based on the same-spin $\Lambda$-type three-level system created between the two E orbital ground states and the A$_1$ orbital excited state of the center, and the cross-linear polarization selection rules obtained with the application of transverse electric field or uniaxial stress. Possible decay and decoherence mechanisms of this system are discussed, and it is shown that high-efficiency, noise-free storage of photons as short as a few tens of picoseconds for at least a few nanoseconds could be possible at low temperature.