Why the two-pulse photon echo is not a good quantum memory protocol
- Laboratoire Aime Cotton, CNRS-UPR 3321, Universite Paris-Sud, Bat. 505, 91405 Orsay Cedex (France)
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4 (Switzerland)
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 {pi}-rephasing pulse in the sequence. Our physical interpretation of the process is well supported by its experimental implementation in a Tm{sup 3+}:yttrium aluminum garnet crystal thanks to an accurate control of the rephasing pulse area. We finally address independently the fundamental limitations of the quantum fidelity. Our work allows us to point out on one side the real drawbacks of this scheme for quantum storage and on the other side its specificities which can be a source of inspiration to conceive more promising procedures with rare-earth ion doped crystals.
- OSTI ID:
- 21313127
- Journal Information:
- Physical Review. A, Vol. 79, Issue 5; Other Information: DOI: 10.1103/PhysRevA.79.053851; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
Similar Records
Quantum memory in the revival of silenced echo scheme in an optical resonator
Photon-echo quantum memory with complete use of natural inhomogeneous broadening