Experimental characterization of multi-photon entanglement with intensity correlation functions

I. N. Agafonov; M. V. Chekhova; T. Sh. Iskhakov

doi:10.1117/12.751460

19 July 2007 Experimental characterization of multi-photon entanglement with intensity correlation functions

I. N. Agafonov, M. V. Chekhova, T. Sh. Iskhakov

Proceedings Volume 6726, ICONO 2007: Physics of Intense and Superintense Laser Fields; Attosecond Pulses; Quantum and Atomic Optics; and Engineering of Quantum Information; 67262C (2007) https://doi.org/10.1117/12.751460
Event: The International Conference on Coherent and Nonlinear Optics, 2007, Minsk, Belarus

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.

Citation Download Citation

I. N. Agafonov, M. V. Chekhova, and T. Sh. Iskhakov "Experimental characterization of multi-photon entanglement with intensity correlation functions", 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); https://doi.org/10.1117/12.751460

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