PsiQuantum’s approach is different from Microsoft’s efforts in topological qubits (Microsoft’s approach would enable error correction in hardware via topological protection from local noise). PsiQuantum and Microsoft have different sets of engineering challenges to address with their distinct approaches, but the companies share the vision for a scalable, fault tolerant quantum computer.
PsiQuantum’s founders are renowned leaders in linear optical quantum computing. After spending 10+ years advancing the field in academia, they launched the company in 2015. The startup is focused on building photonic qubits with well-established semiconductor techniques and material substrates. (Medium.com)