Boosted Bell-state measurements for photonic quantum computation
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866908557244366848 |
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| author | Hauser, Nico Bayerbach, Matthias J. D'Aurelio, Simone E. Weber, Raphael Santandrea, Matteo Kumar, Shreya P. Dhand, Ish Barz, Stefanie |
| author_facet | Hauser, Nico Bayerbach, Matthias J. D'Aurelio, Simone E. Weber, Raphael Santandrea, Matteo Kumar, Shreya P. Dhand, Ish Barz, Stefanie |
| contents | Fault-tolerant fusion-based photonic quantum computing (FBQC) greatly relies on entangling two-photon measurements, called fusions. These fusions can be realized using linear-optical projective Bell-state measurements (BSMs). These linear-optical BSMs are limited to a success probability of 50%, greatly reducing the performance of FBQC schemes. To improve the performance of FBQC architectures, a boosted BSM scheme taking advantage of ancillary entangled photon pairs and a 4x4 multiport interferometer has been proposed. This scheme allows the success probability to be increased up to 75%. In this work, we experimentally demonstrate this boosted BSM by using two Sagnac photon-pair sources and a fibre-based 4x4 multiport beam splitter. A boosted BSM success probability of $(69.3\pm0.3)\%$ has been achieved, exceeding the 50% limit. Furthermore, based on our BSMs, we calculate photon-loss thresholds for a fusion network using encoded six-ring resource states. We show that with this boosted BSM scheme an individual photon loss probability of 1.4% can be tolerated, while the non-boosted BSM leads to a photon-loss threshold of 0.45%. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_16380 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Boosted Bell-state measurements for photonic quantum computation Hauser, Nico Bayerbach, Matthias J. D'Aurelio, Simone E. Weber, Raphael Santandrea, Matteo Kumar, Shreya P. Dhand, Ish Barz, Stefanie Quantum Physics Fault-tolerant fusion-based photonic quantum computing (FBQC) greatly relies on entangling two-photon measurements, called fusions. These fusions can be realized using linear-optical projective Bell-state measurements (BSMs). These linear-optical BSMs are limited to a success probability of 50%, greatly reducing the performance of FBQC schemes. To improve the performance of FBQC architectures, a boosted BSM scheme taking advantage of ancillary entangled photon pairs and a 4x4 multiport interferometer has been proposed. This scheme allows the success probability to be increased up to 75%. In this work, we experimentally demonstrate this boosted BSM by using two Sagnac photon-pair sources and a fibre-based 4x4 multiport beam splitter. A boosted BSM success probability of $(69.3\pm0.3)\%$ has been achieved, exceeding the 50% limit. Furthermore, based on our BSMs, we calculate photon-loss thresholds for a fusion network using encoded six-ring resource states. We show that with this boosted BSM scheme an individual photon loss probability of 1.4% can be tolerated, while the non-boosted BSM leads to a photon-loss threshold of 0.45%. |
| title | Boosted Bell-state measurements for photonic quantum computation |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2410.16380 |