Narrow-Band Entangled Photon-Pair Source for a Quantum Repeater Based on Solid-State Quantum Memory

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发表日期：

2024年6月1日

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D. A. Turaykhanov,
I. Z. Latypov,
A. V. Shkalikov,
A. A. Kalachev

摘要

We present the results of experimental study of nondegenerate spontaneous parametric downconversion in a single-resonance optical parametric oscillator with two PPKTP crystals. The possibility of generating narrow-band polarization-entangled photons, one of which has a wavelength of 580 nm and a spectral width of 8.0 ± 1.5 MHz, has been shown. This makes such a source of photon pairs compatible with solid-state quantum memory based on a Y₂SiO₅ : Eu³⁺ crystal, which is promising for quantum repeaters.