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Proceedings Paper

Compensated crystal assemblies for type-II entangled photon generation in quantum cluster states
Author(s): Michael Fanto; Thomas McEwen; Reinhard Erdmann; Enrique Galvez
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Paper Abstract

Spontaneous downconversion yields photons for Quantum-Optical-Gate development though their generation is probabilistic. Optimized efficiency requires control over the spectral wavefunction, generally achieved via spectral filtering which sacrifices most downconverted photons. Selecting crystal parameters to address the issue has been demonstrated, but no natural media enable this for 800 nm applications with optimal detection. Synthesizing parameters with super-lattices of known crystals was also analyzed but two-crystal experiments were insufficient to exploit it. Prototype twelve-crystal-assemblies have now been fabricated and the first results are reported here. We review implications for further work and discuss how methods described here enhance efficiency in applications of entangled photons requiring multi-crystal sources, such as cluster states, entanglement swapping, and teleportation.

Paper Details

Date Published: 11 May 2010
PDF: 8 pages
Proc. SPIE 7702, Quantum Information and Computation VIII, 77020H (11 May 2010); doi: 10.1117/12.852641
Show Author Affiliations
Michael Fanto, Air Force Research Lab. (United States)
Thomas McEwen, Air Force Research Lab. (United States)
Reinhard Erdmann, Air Force Research Lab. (United States)
Enrique Galvez, Colgate Univ. (United States)

Published in SPIE Proceedings Vol. 7702:
Quantum Information and Computation VIII
Eric J. Donkor; Andrew R. Pirich; Howard E. Brandt, Editor(s)

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