A manufacturable platform for photonic quantum computing.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40010377.
- Also identified by DOI 10.1038/s41586-025-08820-7 and PMC identifier 12095036.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Although holding great promise for low noise, ease of operation and networking<sup>1</sup>, useful photonic quantum computing has been precluded by the need for beyond-state-of-the-art components, manufactured by the millions<sup>2-6</sup>. Here we introduce a manufacturable platform<sup>7</sup> 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.