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Article: Remote Blind State Preparation with Weak Coherent Pulses in the Field

TitleRemote Blind State Preparation with Weak Coherent Pulses in the Field
Authors
Issue Date2019
Citation
Physical Review Letters, 2019, v. 123, n. 10, article no. 100503 How to Cite?
Abstract© 2019 American Physical Society. Quantum computing has seen tremendous progress in past years. Due to implementation complexity and cost, the future path of quantum computation is strongly believed to delegate computational tasks to powerful quantum servers on the cloud. Universal blind quantum computing (UBQC) provides the protocol for the secure delegation of arbitrary quantum computations, and it has received significant attention. However, a great challenge in UBQC is how to transmit a quantum state over a long distance securely and reliably. Here, we solve this challenge by proposing a resource-efficient remote blind qubit preparation (RBQP) protocol, with weak coherent pulses for the client to produce, using a compact and low-cost laser. We experimentally verify a key step of RBQP - quantum nondemolition measurement - in the field test over 100 km of fiber. Our experiment uses a quantum teleportation setup in the telecom wavelength and generates 1000 secure qubits with an average fidelity of (86.9±1.5)%, which exceeds the quantum no-cloning fidelity of equatorial qubit states. The results prove the feasibility of UBQC over long distances, and thus serves as a key milestone towards secure cloud quantum computing.
Persistent Identifierhttp://hdl.handle.net/10722/285844
ISSN
2020 Impact Factor: 9.161
2020 SCImago Journal Rankings: 3.688
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorJiang, Yang Fan-
dc.contributor.authorWei, Kejin-
dc.contributor.authorHuang, Liang-
dc.contributor.authorXu, Ke-
dc.contributor.authorSun, Qi Chao-
dc.contributor.authorZhang, Yu Zhe-
dc.contributor.authorZhang, Weijun-
dc.contributor.authorLi, Hao-
dc.contributor.authorYou, Lixing-
dc.contributor.authorWang, Zhen-
dc.contributor.authorLo, Hoi Kwong-
dc.contributor.authorXu, Feihu-
dc.contributor.authorZhang, Qiang-
dc.contributor.authorPan, Jian Wei-
dc.date.accessioned2020-08-18T04:56:48Z-
dc.date.available2020-08-18T04:56:48Z-
dc.date.issued2019-
dc.identifier.citationPhysical Review Letters, 2019, v. 123, n. 10, article no. 100503-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/285844-
dc.description.abstract© 2019 American Physical Society. Quantum computing has seen tremendous progress in past years. Due to implementation complexity and cost, the future path of quantum computation is strongly believed to delegate computational tasks to powerful quantum servers on the cloud. Universal blind quantum computing (UBQC) provides the protocol for the secure delegation of arbitrary quantum computations, and it has received significant attention. However, a great challenge in UBQC is how to transmit a quantum state over a long distance securely and reliably. Here, we solve this challenge by proposing a resource-efficient remote blind qubit preparation (RBQP) protocol, with weak coherent pulses for the client to produce, using a compact and low-cost laser. We experimentally verify a key step of RBQP - quantum nondemolition measurement - in the field test over 100 km of fiber. Our experiment uses a quantum teleportation setup in the telecom wavelength and generates 1000 secure qubits with an average fidelity of (86.9±1.5)%, which exceeds the quantum no-cloning fidelity of equatorial qubit states. The results prove the feasibility of UBQC over long distances, and thus serves as a key milestone towards secure cloud quantum computing.-
dc.languageeng-
dc.relation.ispartofPhysical Review Letters-
dc.titleRemote Blind State Preparation with Weak Coherent Pulses in the Field-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevLett.123.100503-
dc.identifier.pmid31573287-
dc.identifier.scopuseid_2-s2.0-85072661132-
dc.identifier.volume123-
dc.identifier.issue10-
dc.identifier.spagearticle no. 100503-
dc.identifier.epagearticle no. 100503-
dc.identifier.eissn1079-7114-
dc.identifier.isiWOS:000483587200003-
dc.identifier.issnl0031-9007-

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