Dealing with imperfect quantum machines.pdf

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IBM TJ Watson Research Center
Yorktown Heights, NY
Dealing with imperfect quantum machines
Beyond Digital Computing, IWH, Heidelberg Germany March 2018
Antonio Mezzacapo, Abhinav Kandala, Kristan Temme, Maika Takita,
Antonio Corcoles, Sergey Bravyi, Markus Brink, Jerry Chow, Jay Gambetta

3 © 2017 IBM Corporation
Or Noisy Intermediate-Scale Quantum
(NISQ) computing (cit. Preskill)
4 © 2017 IBM Corporation
IBM Q 50 qubit system operational20 qubit systems ready for use
5 © 2017 IBM Corporation
Single metric for comparing quantum processors, one number
that captures number of qubits, error rates, connectivity.
Quantum
Volu e
L. Bishop, S. Bravyi, A. Cross, J. Gambetta, J. Smolin, Technical report, 2017
https://storageconsortium.de/content/sites/default/files/quantum-volumehp08co1vbo0cc8fr.pd
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First, compute effective error rate by averaging two-qubit gate errors
on random pairs of qubits in the setup. Use SWAP chains between
distant qubits. Then:
Dept
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