Adaptive Weight Estimator for Quantum Error Correction in a Time‐Dependent Environment
Abstract
Quantum error correction of a surface code or repetition code requires the pairwise matching of error events in a space‐time graph of qubit measurements, such that the total weight of the matching is minimized. The input weights follow from a physical model of the error processes that affect the qubits. This approach becomes problematic if the system has sources of error that change over time. Here, it is shown that the weights can be determined from the measured data in the absence of an error model. The resulting adaptive decoder performs well in a time‐dependent environment, provided that the characteristic timescale τenv of the variations is greater than , with the duration of one error‐correction cycle and the typical error probability per qubit in one cycle.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 30, 2018
- Source ID
- 10.1002/qute.201800012
Entities
People
- Brian Tarasinski
- Carlo W. J. Beenakker
- Stephen T. Spitz
- Thomas E. O’brien
Organizations
- Dutch Research Council
- European Research Council
- Intelligence Advanced Research Projects Activity
- Leiden University