We present an extension of the atomic frequency comb protocol that utilizes the Stark effect to perform noise-free, on-demand, control. An experimental realization of this protocol was implemented in the Pr3+:Y2SiO5 solid-state system, and a recall efficiency of 38\% for a 0.8 μs storage time was achieved. Experiments were performed with both bright pulses as well as weak-coherent states, the latter achieving a signal-to-noise ratio of 570±120 using input pulses with an average photon number of ∼0.1. The principal limitation for a longer storage time was found to be the minimum peak width attainable for Pr3+:Y2SiO5. We employ an adaptation of an established atomic-frequency comb model to investigate an on-demand, wide-bandwidth, memory based on Eu3+:Y2SiO5. From this we determine that a storage time as long as 100 μs may be practical even without recourse to spin-wave storage.
@article{arxiv.2006.00943,
title = {Noise Free On-Demand Atomic Frequency Comb Quantum Memory},
author = {Sebastian P. Horvath and Mohammed K. Alqedra and Adam Kinos and Andreas Walther and Jan Marcus Dahlström and Stefan Kröll and Lars Rippe},
journal= {arXiv preprint arXiv:2006.00943},
year = {2021}
}