Extensible Photonics Achieves Universal Quantum Gate Sets
Extensible Photonics has demonstrated a photonic chip implementing a universal set of quantum gates, including single-qubit rotations and an entangling two-qubit gate. The gates were characterized using quantum process tomography, confirming their operation. This represents a step toward fully integrated photonic quantum processors.
A small-scale photonic quantum processor running variational algorithms could be built within two years, leveraging this universal gate set integrated with on-chip photon sources.