Classical visibility limit for three-photon interference |
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Authors: | I N Agafonov T Sh Iskhakov A N Penin M V Chekhova |
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Institution: | (1) Faculty of Physics, Moscow State University, Moscow, 119992, Russia |
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Abstract: | It is shown theoretically and experimentally that the third-order interference of intensities, which is studied in many works performed in the last decade and is usually attributed to three-photon entanglement, can also be observed for classical light with a high visibility up to 81.8%. The calculations show that classical sources ensure an even higher visibility of the interference pattern up to 94.4% for fourth order intensity interference. Thus, a large visibility of the interference pattern of the third and higher orders cannot be considered an attribute of the nonclassical character of the effect. |
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