Analysis of Schmidt modes of ultra-broadband biphotons generated in a photonic crystal fiber

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We presented numerical estimates of the degree of quantum entanglement based on Schmidt mode analysis for ultra-broadband biphotonic states generated in a photonic crystal fiber. We show that these states have a high degree of quantum entanglement even when the source is pumped broadband by femtosecond laser pulses.

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作者简介

M. Smirnov

Kazan National Research Technical University

编辑信件的主要联系方式.
Email: maxim@kazanqc.org

Kazan Quantum Center

俄罗斯联邦, Kazan

A. Smirnova

Kazan National Research Technical University

Email: maxim@kazanqc.org

Kazan Quantum Center

俄罗斯联邦, Kazan

A. Khairullin

Kazan National Research Technical University

Email: maxim@kazanqc.org

Kazan Quantum Center

俄罗斯联邦, Kazan

O. Ermishev

Kazan National Research Technical University

Email: maxim@kazanqc.org

Kazan Quantum Center

俄罗斯联邦, Kazan

S. Moiseev

Kazan National Research Technical University

Email: maxim@kazanqc.org

Kazan Quantum Center

俄罗斯联邦, Kazan

参考

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2. Fig. 1. Schematic diagram of biphoton generation in an optical fiber with nonlinear susceptibility χ(3) (a). Schematic representation of the function of the joint spectral intensity of the generated photons, K is the Schmidt parameter (b). Energy diagram of the spontaneous four-wave mixing process, in which two pump photons are transformed into two daughter photons at other frequencies (c).

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3. Fig. 2. Joint spectral intensity |F(ωs, ωi)|2 and the corresponding distributions of the Schmidt mode coefficients for different values ​​of pump wavelengths near the phase matching extremum point: λp = 751 (a, b), 752 nm (c, d).

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