PsiQuantum

PsiQuantum is an American quantum computing company based in Palo Alto, California, that is developing the world's first commercially viable utility-scale quantum computer. Unlike competitors using superconducting or trapped-ion approaches, PsiQuantum has pioneered a photonic quantum computing architecture that uses single photons manipulated through silicon photonic chip technology to create qubits.

The company's photonic approach leverages established semiconductor manufacturing processes, enabling production at commercial scale through partnerships with leading chip foundries. Since 2017, PsiQuantum has worked with GlobalFoundries at their New York fabrication facility, manufacturing the silicon photonic and electronic chips that form the foundation of their quantum systems. This manufacturing partnership represents a significant competitive advantage, as PsiQuantum can produce quantum computing components using proven, high-volume semiconductor processes.

In February 2025, PsiQuantum announced its Omega chipset, a groundbreaking manufacturable chipset for photonic quantum computing that integrates high-performance single-photon sources, superconducting single-photon detectors, and next-generation optical switches. The Omega chipset achieved remarkable benchmarks including single-qubit fidelity of 99.98% and two-qubit fusion gate fidelity of 99.22%, representing a new level of technical maturity for photonic quantum systems.

PsiQuantum is building two datacenter-sized Quantum Compute Centers in Brisbane, Australia and Chicago, Illinois. The Brisbane facility, backed by a A$940 million investment from the Australian and Queensland governments, represents a major milestone in bringing utility-scale quantum computing to reality with an ambitious timeline to become operational by the end of 2027.