IBM unveils quantum error fix with 63-fold lower overhead

IBM researchers published a method called spacetime probabilistic error cancellation that combines probabilistic error cancellation with quantum error detection, cutting sampling overhead by 63x. Verified on IBM's Aachen superconducting processor, it screens out up to 65% of errors in advance.

• Sampling overhead reduced by a factor of 63
• Method screens out up to 65% of errors in advance
• Verified on IBM's Aachen superconducting processor
• IBM targets 1,000 qubits by 2027 and Starling by 2029