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Proceedings Paper

Experimental characterization of multi-photon entanglement with intensity correlation functions
Author(s): I. N. Agafonov; M. V. Chekhova; T. Sh. Iskhakov
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Paper Abstract

We consider possible ways to recognize multi-photon entangled states in experiment. A commonly used technique is to measure higher-order multi-photon correlation functions and their dependence on certain phase delays (multi-photon interference). Theoretically and experimentally, we show that multi-photon interference can have very high visibility for classical sources: up to 81.8% in the three-photon case and up to 94.4% in the four-photon one. Therefore, the visibility of multi-photon interference should not be used as a criterion of multi-photon entangled states generation. Instead, we suggest to characterize multi-photon entanglement by the photon-number dependence of the normalized correlation functions.

Paper Details

Date Published: 19 July 2007
PDF: 8 pages
Proc. SPIE 6726, ICONO 2007: Physics of Intense and Superintense Laser Fields; Attosecond Pulses; Quantum and Atomic Optics; and Engineering of Quantum Information, 67262C (19 July 2007); doi: 10.1117/12.751460
Show Author Affiliations
I. N. Agafonov, Moscow State Univ. (Russia)
M. V. Chekhova, Moscow State Univ. (Russia)
T. Sh. Iskhakov, Moscow State Univ. (Russia)


Published in SPIE Proceedings Vol. 6726:
ICONO 2007: Physics of Intense and Superintense Laser Fields; Attosecond Pulses; Quantum and Atomic Optics; and Engineering of Quantum Information

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