In this book chapter we review photon echo based schemes for optical quantum memory. We outline the basic principles of the Atomic Frequency Comb (AFC), Gradient Echo Memory (GEM) and Rephased Amplified Spontaneous Emission (RASE) protocols. We describe the properties of the rare-earth ion and gaseous vapours ensembles that have been used to carry out experimental demonstrations. These experiments are then discussed with reference to relevant classical and quantum performance criteria.
@article{arxiv.1902.04313,
title = {Echo-Based Quantum Memory},
author = {G. T. Campbell and K. R. Ferguson and M. J. Sellars and B. C. Buchler and P. K. Lam},
journal= {arXiv preprint arXiv:1902.04313},
year = {2019}
}
Comments
Chapter 32 of Quantum Information: From Foundations to Quantum Technology Applications, 2nd Edition, Edited by Dagmar Bruss and Gerd Leuchs. (Wiley-VCH 2019)