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Mitigating coherent noise using Pauli conjugation

Abstract:

Coherent noise can be much more damaging than incoherent (probabilistic) noise in the context of quantum error correction. One solution is to use twirling to turn coherent noise into incoherent Pauli channels. In this Article, we show that some of the coherence of the noise channel can actually be used to improve its logical fidelity by simply sandwiching the noise with a chosen pair of Pauli gates, which we call Pauli conjugation. Using the optimal Pauli conjugation, we can achieve a higher ...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1038/s41534-019-0233-0

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Institution:
University of Oxford
Department:
Materials
Role:
Author
ORCID:
0000-0002-7766-5348
More by this author
Institution:
University of Oxford
Department:
Materials
Role:
Author
ORCID:
0000-0002-7766-5348
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Materials
Oxford college:
Exeter College
Role:
Author
ORCID:
0000-0002-7766-5348
Publisher:
Springer Nature Publisher's website
Journal:
npj Quantum Information Journal website
Volume:
6
Article number:
17
Publication date:
2020-02-05
Acceptance date:
2019-12-06
DOI:
EISSN:
2056-6387
Language:
English
Keywords:
Pubs id:
pubs:1076840
UUID:
uuid:ca08b9cb-0384-467e-8a18-76ee42b5f67a
Local pid:
pubs:1076840
Source identifiers:
1076840
Deposit date:
2019-12-07

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