Real-time adaptation of quantum noise channel estimates
arXiv:2501.18685 · doi:10.1103/PhysRevA.111.062609
Abstract
Estimates of noise channels for quantum gates are required for most error mitigation techniques and are desirable for informing quantum error correction decoders. These estimates can be obtained by resource-intensive off-line characterization techniques, but can become stale due to device drift and fluctuations. We propose a method to address this issue by performing real-time adaptation of noise channel estimates during the execution of a quantum algorithmic circuit using extended flag gadgets, mid-circuit measurements and Bayesian inference. We carry out analytical calculations and numerical simulations employing a Dirichlet prior distribution for the error rates in a Pauli channel to demonstrate and evaluate the technique, which can be seen as a protocol for real-time calibration of high-level gate error information.
18 pages, 12 figures, 3 appendices. v2: minor revisions, one figure and one appendix added
References in corpus (14)
- Error mitigation for short-depth quantum circuits
- A Theory of Fault-Tolerant Quantum Computation
- Extending the computational reach of a noisy superconducting quantum processor
- Noise tailoring for scalable quantum computation via randomized compiling
- Stim: a fast stabilizer circuit simulator
- Symmetrised Characterisation of Noisy Quantum Processes
- Quantum error correction with only two extra qubits
- Gate Set Tomography
- Flag fault-tolerant error correction with arbitrary distance codes
- Efficient estimation of Pauli channels
- Efficient error models for fault-tolerant architectures and the Pauli twirling approximation
- Standard forms of noisy quantum operations via depolarization
- Fault-tolerant quantum error correction for Steane's seven-qubit color code with few or no extra qubits
- Extended flag gadgets for low-overhead circuit verification