MilestoneError correctionClaimed
Microsoft and Quantinuum report logical qubits with far fewer errors
Apr 3, 2024
Microsoft and Quantinuum say they made four logical qubits from 30 trapped-ion qubits, with error rates up to 800 times lower than those of the physical qubits. Their preprint notes the best figures depend on discarding runs in which errors were detected.
Why it matters
Error correction is only worthwhile if logical qubits make fewer errors than the physical qubits they are built from, as reported here.
Related
Sources (3)
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Quantinuum
Quantinuum Partners with Microsoft in New Phase of Reliable Quantum Computing with Breakthrough Demonstration of Reliable Logical Qubits
“A collaboration between Quantinuum's team in the USA and UK and Microsoft's quantum computing team has led to the creation of four logical qubits that demonstrate error rates 800 times lower than corresponding physical error rates.”
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arXiv (Paetznick et al.)
Demonstration of logical qubits and repeated error correction with better-than-physical error rates
“In particular, we entangled logical qubits encoded in the [[7,1,3]] code with error rates 9.8 times to 500 times lower than at the physical level, and entangled logical qubits encoded in a [[12,2,4]] code based on Knill's C4/C6 scheme with error rates 4.7 times to 800 times lower than at the physical level, depending on the judicious use of post-selection.”
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The Quantum Insider
Beyond NISQ: Microsoft And Quantinuum Research Project Yields 'Most Reliable Logical Qubits Ever Recorded'
“Microsoft and Quantinuum created logical qubits with an error rate 800 times better than physical qubits and made four highly reliable logical qubits from only 30 physical qubits.”
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