Measurement-free topological protection using dissipative feedback

Fujii, Keisuke; Negoro, Makoto; Imoto, Nobuyuki et al.

Physical Review X, 2014, 4(4), 041039

Number of Access:761（2025-09-03 11:38 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/77648

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Title
Measurement-free topological protection using dissipative feedback
Creator
NRID
1000040708640 1000040708640
ORCID
0000-0003-0390-9984 0000-0003-0390-9984
researchmap permalink
7000009401 7000009401
Scopus Author ID
57204923718 57204923718
CreatorName
Fujii, Keisuke
NRID
1000070611549 1000070611549
researchmap permalink
DNPne56 DNPne56
Scopus Author ID
36553027400 36553027400
CreatorName
Negoro, Makoto
NRID
1000000313479 1000000313479
CreatorName
Imoto, Nobuyuki
NRID
1000020252629 1000020252629
ORCID
0000-0002-7434-6472 0000-0002-7434-6472
researchmap permalink
read0079549 read0079549
Scopus Author ID
8326938600 8326938600
CreatorName
Kitagawa, Masahiro
Subject
Condensed matter physics
Quantum information
Quantum physics
Abstract
Protecting quantum information from decoherence due to environmental noise is vital for fault-tolerant quantum computation. To this end, standard quantum error correction employs parallel projective measurements of individual particles, which makes the system extremely complicated. Here, we propose measurement-free topological protection in two dimensions without any selective addressing of individual particles. We make use of engineered dissipative dynamics and feedback operations to reduce the entropy generated by decoherence in such a way that quantum information is topologically protected. We calculate an error threshold, below which quantum information is protected, without assuming selective addressing, projective measurements, or instantaneous classical processing. All physical operations are local and translationally invariant, and no parallel projective measurement is required, which implies high scalability. Furthermore, since the engineered dissipative dynamics we utilize has been well studied in quantum simulation, the proposed scheme can be a promising route progressing from quantum simulation to fault-tolerant quantum information processing.
Publisher
American Physical Society
Source Title
Physical Review X
Volume (Issue)
4(4)
Page
041039
Date of Issued
2014-12-01
Language
English
Handle URL
https://hdl.handle.net/11094/77648
eISSN
21603308
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1103/PhysRevX.4.041039
Access Rights
open access
CopyRight
Copyright (2014) by the American Physical Society
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article