Monitoring the generation of photonic linear cluster states with partial measurements
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arXiv
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| Format: | Preprint |
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2025
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| author | Guichard, Valentin Vidro, Leonid Fioretto, Dario A. Steindl, Petr Istrati, Daniel Pilnyak, Yehuda Pont, Mathias Morassi, Martina Lemaître, Aristide Sagnes, Isabelle Somaschi, Niccolo Belabas, Nadia Eisenberg, Hagai Senellart, Pascale |
| author_facet | Guichard, Valentin Vidro, Leonid Fioretto, Dario A. Steindl, Petr Istrati, Daniel Pilnyak, Yehuda Pont, Mathias Morassi, Martina Lemaître, Aristide Sagnes, Isabelle Somaschi, Niccolo Belabas, Nadia Eisenberg, Hagai Senellart, Pascale |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_01929 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Monitoring the generation of photonic linear cluster states with partial measurements Guichard, Valentin Vidro, Leonid Fioretto, Dario A. Steindl, Petr Istrati, Daniel Pilnyak, Yehuda Pont, Mathias Morassi, Martina Lemaître, Aristide Sagnes, Isabelle Somaschi, Niccolo Belabas, Nadia Eisenberg, Hagai Senellart, Pascale Quantum Physics 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. |
| title | Monitoring the generation of photonic linear cluster states with partial measurements |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2505.01929 |