PsiQuantum Targets Million Silicon Photonic Qubits by 2025

Psiquantum has raised $215 million to develop what they claim will be the first useful general purpose quantum computer.

They plan to make a million qubit quantum computer with error correction. Error correction is at the center of everything they do. They plan to reach the million error-corrected qubit level within 5 years. A million qubits will likely mean about 1000 error corrected qubits.

PsiQuantum is based in Palo Alto and has been working on their designs for 5 years.

Microsoft is one of the strategic backers of PsiQuantum.

Google, Intel, IBM, Honeywell, D-Wave Systems, Rigetti and IonQ are all developing quantum computers using a variety of technologies. Most are using superconducting qubits and IonQ is using trapped ion. Most are at 50-100 qubits. D-Wave has about 5000 qubits but they are using a quantum annealing system with less powerful qubits. The 50-100 noisy superconducting qubits have no error correction.

1000 error corrected qubits should be definitively better than conventional computers for the problems where the physics of quantum computing give quantum systems an advantage.

Those should be problems related to optimization or large searches.

Nature Photonics (2009) – Photonic quantum technologies

The first quantum technology that harnesses quantum mechanical effects for its core operation has arrived in the form of commercially available quantum key distribution systems. This technology achieves enhanced security by encoding information in photons such that an eavesdropper in the system can be detected. Anticipated future quantum technologies include large-scale secure networks, enhanced measurement and lithography, and quantum information processors, which promise exponentially greater computational power for particular tasks. Photonics is destined to have a central role in such technologies owing to the high-speed transmission and outstanding low-noise properties of photons. These technologies may use single photons, quantum states of bright laser beams or both, and will undoubtedly apply and drive state

SOURCES – Psiquantum, Forbes, Pitchbook
Written by Brian Wang,