Rigetti Computing to go public

Re:Rigetti Computing to go public by the_duke on Wednesday October 06, 2021 @09:45AM (#28773109)

> Rigetti expects to scale its quantum computers from 80 qubits in 2021, to 1,000 qubits in 2024, and to 4,000 qubits in 2026.

Is that realistic at all? From what I've read on the subject, everyone seems to have trouble scaling up.

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Re:Rigetti Computing to go public by krastanov on Wednesday October 06, 2021 @09:50AM (#28773175)

Having a device with 1000 transmons does not seem too crazy to me. But I would be deeply impressed if the quality of these 1000 transmons is not lower than the quality of the current 80. And keep in mind that either way these will be "physical" qubits, not error protected logical qubits. It takes hundreds or thousands of noisy physical qubits to make reliable logical qubits (with error correcting codes).

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Re:Rigetti Computing to go public by wadeparzival on Wednesday October 06, 2021 @10:06AM (#28773352)

IBM has a similar timeline in its roadmap, going from 65 qubits in 2020 to 1,121 qubits in 2023. From their blog [1], it seems like scaling beyond 1,000 will be the real challenge.

[1] https://research.ibm.com/blog/ibm-quantum-roadmap

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