A manufacturable platform for photonic quantum computing
PsiQuantum team, Koen Alexander, Avishai Benyamini, Dylan S. Black, Damien Bonneau, Stanley P. Burgos, Ben M. Burridge, Hugo Cable, Geoff Campbell, Gabriel Catalano, Alejandro Ceballos, Chia‐Ming Chang, Sourav Sen Choudhury, C. J. Chung, Fariba Danesh, Tom Dauer, Michael W. Davis, Eric Dudley, Ping Er-Xuan, Josep Fargas, Alessandro Farsi, Colleen S. Fenrich, Jonathan Frazer, Masaya Fukami, Yogeeswaran Ganesan, Gary A. P. Gibson, Mercedes Gimeno-Segovia, Sebastian Goeldi, Patrick S. Goley, Ryan Haislmaier, Sami I. Halimi, Paul Hansen, Sam Hardy, Jason Horng, Matthew House, Hong Hu, Mohsen Jadidi, V.K. Jain, Henrik Johansson, T. Hugh Jones, Vimal Kamineni, Nicholas Kelez, Ravi Koustuban, George Kovall, Peter Krogen, Nikhil Kumar, Yong Liang, Nicholas LiCausi, Dan Llewellyn, Kimberly Lokovic, Michael Lovelady, Vitor R. Manfrinato, Ann Melnichuk, Gabriel Omar Mendoza Conde, Brad Moores, Shaunak Mukherjee, J. H. D. Munns, François-Xavier Musalem, Faraz Najafi, Jeremy L. O’Brien, J. Elliott Ortmann, Sunil Pai, Bryan Park, Hsuan-Tung Peng, Nicholas Penthorn, Brennan Peterson, G. A. Peterson, Matt Poush, Geoff J. Pryde, Tarun Ramprasad, Gareth Ray, Angelita Viejo Rodriguez, Brian J. Roxworthy, Terry Rudolph, D. J. Saunders, Pete Shadbolt, Deesha Shah, Andrea Bahgat Shehata, Hyungki Shin, J.H. Sinsky, Jake Smith, Ben Sohn, Young-Ik Sohn, Gyeongho Son, Mário C. M. M. Souza, Chris Sparrow, Matteo Staffaroni, Camille Stavrakas, Vijay Sukumaran, Davide Tamborini, Mark G. Thompson, Khanh Bao Tran, Mark Triplett, Maryann Tung, Andrzej Veitia, Alexey Vert, Mihai D. Vidrighin, I. Vorobeichik, Peter O. Weigel, Matthew Wingert
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.