Programmable multiphoton graph states on a silicon chip
11:50 - 12:10
Jeremy Adcock, Caterina Vigliar, Samuel Morley-Short, Raffaele Santagati, Josh Silverstone and Mark Thompson Quantum computers promise a paradigm shift humanity’s information processing capability. Measurement-based quantum computing—built on graph states—is the prevailing architecture for large-scale quantum computation. Meanwhile, silicon quantum photonics is a high-performance, scalable quantum technology platform, boasting circuits of unparalleled size. We present the first integrated device to wield four-photon entanglement, generating every type of four-qubit graph states. We also verify our photon's indistinguishability via high-visibility on-chip quantum interference. Finally, we bound the leading sources of error, combining a detailed model of the device with Bayesian parameter estimation, paving the way to scalability.
