Coherent control of collective atom phase for ultralong, inversion-free photon echoes
Quantum Physics
2013-05-30 v1
Abstract
To overcome fundamental limitations of the \pi optical pulse-induced population inversion and optical decay-caused short storage time in conventional photon echoes, a coherent control of collective atoms is studied for inversion-free, optical decay-halted photon echoes, where the constraint of photon storage time is now replaced by a spin population decay process. Using phase-controlled double rephasing, an inversion-free photon echo scheme is obtained, where no spontaneous or stimulated emission-driven quantum noise exists. Thus, the present method can be applied for ultralong quantum memories in quantum repeaters for long-distance quantum communications.
Keywords
Cite
@article{arxiv.1110.3478,
title = {Coherent control of collective atom phase for ultralong, inversion-free photon echoes},
author = {B. S. Ham},
journal= {arXiv preprint arXiv:1110.3478},
year = {2013}
}
Comments
4 pages, 4 figures