# A manufacturable platform for photonic quantum computing

Article · PsiQuantum team, Koen Alexander, Avishai Benyamini, Dylan S. Black, Damien Bonneau, Stanley P. Burgos, Ben M. Burridge, Hugo V. Cable, Geoff Campbell, Gabriel Catalano, Alejandro Ceballos, Chia-Ming Chang, Sourav Sen Choudhury, Chia-Jung Chung, Fariba Danesh, Tom Dauer, Michael W. Davis, Eric F. Dudley, Ping Er-Xuan, Josep M. Fargas Cabanillas, Alessandro Farsi, Colleen S. Fenrich, Jonathan Frazer, Masaya Fukami, Yogeeswaran Ganesan and 75 more

- Archive id: doi:10.1038/s41586-025-08820-7
- Published: 2025-02-26
- Venue: Nature
- DOI: https://doi.org/10.1038/s41586-025-08820-7
- PMID: 40010377
- Citations: 241
- Source URL: https://doi.org/10.1038/s41586-025-08820-7
- Provenance: openalex

## Abstract

Abstract Although holding great promise for low noise, ease of operation and networking 1 , useful photonic quantum computing has been precluded by the need for beyond-state-of-the-art components, manufactured by the millions 2–6 . Here we introduce a manufacturable platform 7 for quantum computing with photons. We benchmark a set of monolithically integrated silicon-photonics-based modules to generate, manipulate, network and detect heralded photonic qubits, demonstrating dual-rail photonic qubits with 99.98% ± 0.01% state preparation and measurement fidelity, Hong–Ou–Mandel (HOM) quantum interference between independent photon sources with 99.50% ± 0.25% visibility, two-qubit fusion with 99.22% ± 0.12% fidelity and a chip-to-chip qubit interconnect with 99.72% ± 0.04% fidelity, conditional on photon detection and not accounting for loss. We preview a selection of next-generation technologies: low-loss silicon nitride (SiN) waveguides and components to address loss, as well as fabrication-tolerant photon sources, high-efficiency photon-number-resolving detectors (PNRDs), low-loss chip-to-fibre coupling and barium titanate (BTO) electro-optic phase shifters for high-performance fast switching.

_Abstract reproduced under CC-BY (publisher license, via OpenAlex)._

Topics: [Photonic, Spin & Topological Qubits](https://space-kitty.com/topics/photonic-topological-qubits)

---
Space Kitty Archive · https://space-kitty.com · API: https://space-kitty.com/api/v1 · MCP: https://space-kitty.com/mcp · Premium: $0.20/request via x402 (Base Sepolia (testnet)). Metadata: arXiv (CC0), OpenAlex (CC0), Europe PMC (CC BY/CC0 works), ClinicalTrials.gov.