Boosted Bell-state measurements for photonic quantum computation
Abstract 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...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-03-01
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| Series: | npj Quantum Information |
| Online Access: | https://doi.org/10.1038/s41534-025-00986-2 |
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| author | Nico Hauser Matthias J. Bayerbach Simone E. D’Aurelio Raphael Weber Matteo Santandrea Shreya P. Kumar Ish Dhand Stefanie Barz |
| author_facet | Nico Hauser Matthias J. Bayerbach Simone E. D’Aurelio Raphael Weber Matteo Santandrea Shreya P. Kumar Ish Dhand Stefanie Barz |
| author_sort | Nico Hauser |
| collection | DOAJ |
| description | Abstract 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. The performance of FBQC can be improved using boosting, thus achieving higher success probabilities by adding additional resources. Here, we realize a boosted BSM using a 4 × 4 multiport splitter and an additional entangled photon pair, allowing for a success probability of up to 75%. In our experiment, we obtain a success probability for our boosted BSM of (69.3 ± 0.3)%, clearly exceeding the 50% limit. We further demonstrate the significance of our boosted BSM for FBQC, showing a threefold increase in robustness to photon loss and a significant reduction of the logical error rates. |
| format | Article |
| id | doaj-art-cd39cd6202d34a7ba21acb54f82d433e |
| institution | DOAJ |
| issn | 2056-6387 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Information |
| spelling | doaj-art-cd39cd6202d34a7ba21acb54f82d433e2025-08-20T03:05:46ZengNature Portfolionpj Quantum Information2056-63872025-03-011111710.1038/s41534-025-00986-2Boosted Bell-state measurements for photonic quantum computationNico Hauser0Matthias J. Bayerbach1Simone E. D’Aurelio2Raphael Weber3Matteo Santandrea4Shreya P. Kumar5Ish Dhand6Stefanie Barz7Institute for Functional Matter and Quantum Technologies & Center for Integrated Quantum Science and Technology (IQST), University of StuttgartInstitute for Functional Matter and Quantum Technologies & Center for Integrated Quantum Science and Technology (IQST), University of StuttgartInstitute for Functional Matter and Quantum Technologies & Center for Integrated Quantum Science and Technology (IQST), University of StuttgartQC Design GmbHQC Design GmbHQC Design GmbHQC Design GmbHInstitute for Functional Matter and Quantum Technologies & Center for Integrated Quantum Science and Technology (IQST), University of StuttgartAbstract 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. The performance of FBQC can be improved using boosting, thus achieving higher success probabilities by adding additional resources. Here, we realize a boosted BSM using a 4 × 4 multiport splitter and an additional entangled photon pair, allowing for a success probability of up to 75%. In our experiment, we obtain a success probability for our boosted BSM of (69.3 ± 0.3)%, clearly exceeding the 50% limit. We further demonstrate the significance of our boosted BSM for FBQC, showing a threefold increase in robustness to photon loss and a significant reduction of the logical error rates.https://doi.org/10.1038/s41534-025-00986-2 |
| spellingShingle | Nico Hauser Matthias J. Bayerbach Simone E. D’Aurelio Raphael Weber Matteo Santandrea Shreya P. Kumar Ish Dhand Stefanie Barz Boosted Bell-state measurements for photonic quantum computation npj Quantum Information |
| title | Boosted Bell-state measurements for photonic quantum computation |
| title_full | Boosted Bell-state measurements for photonic quantum computation |
| title_fullStr | Boosted Bell-state measurements for photonic quantum computation |
| title_full_unstemmed | Boosted Bell-state measurements for photonic quantum computation |
| title_short | Boosted Bell-state measurements for photonic quantum computation |
| title_sort | boosted bell state measurements for photonic quantum computation |
| url | https://doi.org/10.1038/s41534-025-00986-2 |
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