Physics / mechanism
Competitive landscape
The primary competition is transmon-based superconducting qubits (IBM, Google), which are mature but require full active error correction on both error axes. Trapped-ion qubits offer high gate fidelity (>99.9%) but slow clock speeds. Photonic qubits (PsiQuantum, QuiX) exploit low decoherence but face deterministic gate challenges. Neutral atoms (Atom Computing, QuEra) offer scalable connectivity. Cat qubits sit between: hardware-level noise bias reduces classical control overhead substantially versus transmons, but require specialised cavity hardware not yet in foundry-ready processes.
Companies using
Connected ideas
Sources
Frontier (open questions)
- To be added.