Characterizing quantum gates via randomized benchmarking
Abstract
We describe and expand upon the scalable randomized benchmarking protocol proposed in Phys. Rev. Lett.PRLTAO0031-900710.1103/PhysRevLett.106.180504 106, 180504 (2011) which provides a method for benchmarking quantum gates and estimating the gate dependence of the noise. The protocol allows the noise to have weak time and gate dependence, and we provide a sufficient condition for the applicability of the protocol in terms of the average variation of the noise. We discuss how state-preparation and measurement errors are taken into account and provide a complete proof of the scalability of the protocol. We establish a connection in special cases between the error rate provided by this protocol and the error strength measured using the diamond norm distance.
- Publication:
-
Physical Review A
- Pub Date:
- April 2012
- DOI:
- 10.1103/PhysRevA.85.042311
- arXiv:
- arXiv:1109.6887
- Bibcode:
- 2012PhRvA..85d2311M
- Keywords:
-
- 03.67.Pp;
- 03.65.Wj;
- 03.67.Lx;
- Quantum error correction and other methods for protection against decoherence;
- State reconstruction quantum tomography;
- Quantum computation;
- Quantum Physics
- E-Print:
- 19 pages, no figures, published version