Why the two-pulse photon echo is not a good quantum memory protocol

Details 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

2008-10-03

arxiv.org/abs/0810.0659v1

Phys. Rev. A 79, 053851 (2009)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.79.053851

We consider in this paper a two-pulse photon echo sequence as a potential quantum light storage protocol. It is widely believed that a two-pulse scheme should lead to very low efficiency and is then not relevant for this specific application. We show experimentally by using a Tm${}^{3+}$:YAG crystal that such a protocol is on contrary very efficient and even too efficient to be considered as a good quantum storage protocol. Our experimental work allows us to point out on one side the real limitations of this scheme and on the other side its benefits which can be a source of inspiration to conceive more promising procedures with rare-earth ion doped crystals.

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