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Two-Photon Interference of Spectrally Entangled Pairs Generated in a Photonic Crystal Fiber

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Abstract

The two-frequency wave function of biphotons generated in the process of spontaneous four-wave mixing in a photonic crystal fiber is studied. A method for estimating the degree of entanglement of biphotons by time-frequency variables is presented and tested experimentally. The degree of spectral anticorrelation of a two-photon wave packet, which can be used as an alternative to the Schmidt and Fedorov parameters for estimating spectral entanglement, is revealed. The results on two-photon interference in a Mach–Zehnder interferometer are used to determine the parameter of spectral anticorrelation for the state generated in the four-wave mixing process in the photonic crystal fiber.

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Funding

This work was supported by the Russian Foundation for Basic Research (grants nos. 18-01-00598A and 18-02-01091A).

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Authors and Affiliations

  1. Department of Physics, Moscow State University, 119991, Moscow, Russia

    A. V. Belinsky, N. S. Starshinov & A. B. Fedotov

Authors
  1. A. V. Belinsky
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  2. N. S. Starshinov
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  3. A. B. Fedotov
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Corresponding author

Correspondence to A. V. Belinsky.

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Translated by V. Alekseev

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Belinsky, A.V., Starshinov, N.S. & Fedotov, A.B. Two-Photon Interference of Spectrally Entangled Pairs Generated in a Photonic Crystal Fiber. Moscow Univ. Phys. 76, 61–72 (2021). https://doi.org/10.3103/S002713492102003X

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  • DOI: https://doi.org/10.3103/S002713492102003X

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