Monitoring the generation of photonic linear cluster states with partial measurements

• URL: http://arxiv.org/abs/2505.01929v1
• Date: Sat, 03 May 2025 21:45:22 GMT
• Title: Monitoring the generation of photonic linear cluster states with partial measurements
• Authors: Valentin Guichard, Leonid Vidro, Dario A. Fioretto, Petr Steindl, Daniel Istrati, Yehuda Pilnyak, Mathias Pont, Martina Morassi, Aristide Lemaître, Isabelle Sagnes, Niccolo Somaschi, Nadia Belabas, Hagai Eisenberg, Pascale Senellart,
• Abstract summary: Quantum states of light with many entangled photons are key resources for photonic quantum computing and quantum communication.<n>We exploit a highly resource-efficient generation scheme based on a linear optical circuit embedding a fibered delay loop acting as a quantum memory.<n>We introduce a method for real-time control of entanglement generation based on partially post-selected measurements.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum states of light with many entangled photons are key resources for photonic quantum computing and quantum communication. In this work, we exploit a highly resource-efficient generation scheme based on a linear optical circuit embedding a fibered delay loop acting as a quantum memory. The single photons are generated with a bright single-photon source based on a semiconductor quantum dot, allowing to perform the entangling scheme up to 6 photons. We demonstrate $2$, $3$, $4$ and $6$-photon entanglement generation at respective rates of $6$kHz, $120$Hz, $2.2$Hz, and $2$mHz, corresponding to an average scaling ratio of $46$. We introduce a method for real-time control of entanglement generation based on partially post-selected measurements. The visibility of such measurements carries faithful information to monitor the entanglement process, an important feature for the practical implementation of photonic measurement-based quantum computation.

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