Hanbury Brown-Twiss interference with massively parallel spectral multiplexing for broadband light

• URL: http://arxiv.org/abs/2509.05649v1
• Date: Sat, 06 Sep 2025 09:00:49 GMT
• Title: Hanbury Brown-Twiss interference with massively parallel spectral multiplexing for broadband light
• Authors: Sergei Kulkov, Ondrej Matousek, Lou-Ann Pestana De Sousa, Lada Radmacherova, Dmitrij Sevaev, Yuri Kurochkin, Stephen Vintskevich, Ermanno Bernasconi, Claudio Bruschini, Tommaso Milanese, Edoardo Charbon, Peter Svihra, Andrei Nomerotski,
• Abstract summary: Two-photon interference in the spectral domain is a powerful resource for quantum technologies.<n>We report the first demonstration of massively parallel, wavelength-resolved photon bunching.<n>Results establish frequency-multiplexed two-photon interference as a scalable and throughput-efficient platform for quantum-enhanced photonic technologies.
• Score: 2.7856853032166105
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Two-photon interference in the spectral domain is a powerful resource for quantum technologies, enabling both precision measurements and scalable entanglement distribution. Here, we report the first demonstration of massively parallel, wavelength-resolved photon bunching, revealing Hanbury Brown-Twiss correlations across 100 independent spectral channels. These observations are enabled by a fast, data-driven single-photon spectrometer that achieves 40 pm spectral and 40 ps temporal resolution over a 10 nm bandwidth, allowing simultaneous access to spectro-temporal photon correlations without the need for narrowband filtering. This approach preserves photon flux while enabling high-dimensional quantum interference measurements across a broad spectrum. Our results establish frequency-multiplexed two-photon interference as a scalable and throughput-efficient platform for quantum-enhanced photonic technologies, with applications ranging from stellar intensity interferometry to broadband entanglement swapping in quantum networks.

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