TL;DR: PsiQuantum is building a million-qubit photonic quantum computer using silicon photonics manufactured in existing semiconductor fabs. Their approach uses fusion-based measurement (no need for determin
PsiQuantum is building a million-qubit photonic quantum computer using silicon photonics manufactured in existing semiconductor fabs. Their approach uses fusion-based measurement (no need for deterministic gates). Advantages: room-temperature operation, compatibility with semiconductor manufacturing, and natural networking. Queensland government invested $940M for a Brisbane facility.
Qubits
Targeting 1 million+ (photonic); not yet disclosed
Technology
Photonic (silicon photonics); fusion-based measurement
Gate Fidelity
N/A - measurement-based quantum computing
Status
Building utility-scale quantum computer in Brisbane, Australia; $940M investment