TL;DR: Zero-Noise Extrapolation (ZNE) is a leading quantum error mitigation technique that runs circuits at multiple noise levels and extrapolates to the zero-noise limit. Unlike full quantum error correctio
Zero-Noise Extrapolation (ZNE) is a leading quantum error mitigation technique that runs circuits at multiple noise levels and extrapolates to the zero-noise limit. Unlike full quantum error correction, ZNE requires no additional qubits and is applicable to current NISQ devices. IBM and others use ZNE as a bridge between current hardware and future fault-tolerant machines.
Type
Error Mitigation (not correction)
Complexity
O(poly(1/ε)) overhead; no additional qubits needed
Application
Improving NISQ-era quantum computation without full error correction