Probabilistic Error Cancellation

From Error Mitigation to Fault-Tolerant Quantum Computing: A Gradual Path Toward Logical Circuits

IBM Quantum presents a staged vision for transitioning from mitigating errors in current quantum devices to error correction and fault-tolerant computing, rather than treating these technologies as separate phases. It highlights research results including an effective reduction in error rates by approximately tenfold and a 63-fold reduction in sampling overhead in hybrid methods, while hardware, reliability, and scalability challenges remain open.