Why the two-pulse photon echo is not a good quantum memory protocol
Why the two-pulse photon echo is not a good quantum memory protocol
We consider in this paper a two-pulse photon echo sequence in the prospect of quantum light storage. We analyze the conditions where quantum storage could be realistically performed. We simply and analytically calculate the efficiency in that limit, and clarify the role of the exactly $\ensuremath{\pi}$-rephasing pulse in the sequence. …