Robust Extraction of Tomographic Information via Randomized Benchmarking
Author(s)
Kimmel, Shelby; da Silva, Marcus P.; Ryan, Colm A.; Johnson, Blake R.; Ohki, Thomas A.
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We describe how randomized benchmarking can be used to reconstruct the unital part of any trace-preserving quantum map, which in turn is sufficient for the full characterization of any unitary evolution or, more generally, any unital trace-preserving evolution. This approach inherits randomized benchmarking’s robustness to preparation, measurement, and gate imperfections, thereby avoiding systematic errors caused by these imperfections. We also extend these techniques to efficiently estimate the average fidelity of a quantum map to unitary maps outside of the Clifford group. The unitaries we consider correspond to large circuits commonly used as building blocks to achieve scalable, universal, and fault-tolerant quantum computation. Hence, we can efficiently verify all such subcomponents of a circuit-based universal quantum computer. In addition, we rigorously bound the time and sampling complexities of randomized benchmarking procedures, proving that the required nonlinear estimation problem can be solved efficiently.
Date issued
2014-03Department
Massachusetts Institute of Technology. Center for Theoretical PhysicsJournal
Physical Review X
Publisher
American Physical Society
Citation
Kimmel, Shelby, Marcus P. da Silva, Colm A. Ryan, Blake R. Johnson, and Thomas Ohki. “Robust Extraction of Tomographic Information via Randomized Benchmarking.” Physical Review X 4, no. 1 (March 2014).
Version: Final published version
ISSN
2160-3308