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Scalable in-situ qubit calibration during repetitive error detection

Authors :
Kelly, J.
Barends, R.
Fowler, A. G.
Megrant, A.
Jeffrey, E.
White, T. C.
Sank, D.
Mutus, J. Y.
Campbell, B.
Chen, Yu
Chen, Z.
Chiaro, B.
Dunsworth, A.
Lucero, E.
Neeley, M.
Neill, C.
O'Malley, P. J. J.
Quintana, C.
Roushan, P.
Vainsencher, A.
Wenner, J.
Martinis, John M.
Source :
Phys. Rev. A 94, 032321 (2016)
Publication Year :
2016

Abstract

We present a method to optimize qubit control parameters during error detection which is compatible with large-scale qubit arrays. We demonstrate our method to optimize single or two-qubit gates in parallel on a nine-qubit system. Additionally, we show how parameter drift can be compensated for during computation by inserting a frequency drift and using our method to remove it. We remove both drift on a single qubit and independent drifts on all qubits simultaneously. We believe this method will be useful in keeping error rates low on all physical qubits throughout the course of a computation. Our method is O(1) scalable to systems of arbitrary size, providing a path towards controlling the large numbers of qubits needed for a fault-tolerant quantum computer<br />Comment: 8 pages with supplemental, 7 figures

Subjects

Subjects :
Quantum Physics

Details

Database :
arXiv
Journal :
Phys. Rev. A 94, 032321 (2016)
Publication Type :
Report
Accession number :
edsarx.1603.03082
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevA.94.032321