2025/05/03 by Valentin Guichard, Leonid Vidro, Guichard, Valentin +25 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #Optical Network Technologies #Photonic and Optical Devices #Quantum Physics (quant-ph) #Quantum optics and atomic interactions
paper · pdf · doi:10.48550/arxiv.2505.01929
openalex publication_date 2025/05/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 6kHz, 120Hz, 2.2Hz, and 2mHz, 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.