Qiskit Paulice automatically identifies, scores and inserts spacetime Pauli checks into arbitrary quantum circuits, letting users discard corrupted shots with minimal added gates and qubits.
IBM built the open-source add-on to tackle noise on current NISQ hardware more efficiently than conventional error correction or sampling-heavy mitigation methods such as zero-noise extrapolation and probabilistic error cancellation.
The software spreads low-weight validation checks across space and time in a circuit, aiming to catch error leaks without the deep, connectivity-hungry measurements that can add more noise than they remove.
IBM said the framework has already improved fidelity on Clifford-dominated circuits with up to 50 qubits and 2,450 entangling gates, and can also feed syndrome data into external mitigation or surface-code pipelines.
The launch underscores IBM's push to raise near-term quantum performance through software while full fault-tolerant quantum computing hardware is still targeted for 2029.
IBM's new software discards quantum errors. Can this 'throwaway' method truly compete with rivals building error-correcting hardware from the ground up?
As quantum computations grow, at what point does discarding failed results become more costly than the errors themselves?
Qiskit Paulice: IBM’s Breakthrough in Scalable Error Detection for NISQ Devices on the Road to Fault-Tolerant Quantum Computing by 2029
Overview
IBM launched Qiskit Paulice in June 2026 to address the urgent need for better error detection on Noisy Intermediate-Scale Quantum (NISQ) devices. Since quantum bits are fragile and easily affected by noise, errors can quickly corrupt results. Qiskit Paulice offers a low-overhead way to identify and manage these errors, making quantum computations on current hardware more reliable. By improving error detection, Paulice helps ensure that meaningful results can be extracted from quantum computations, marking a significant step toward dependable quantum technology.