Repeater-enhanced distributed quantum sensing based on continuous-variable multipartite entanglement
AffiliationUniv Arizona, Coll Opt Sci
Univ Arizona, Dept Mat Sci & Engn
MetadataShow full item record
PublisherAMER PHYSICAL SOC
CitationXia, Y., Zhuang, Q., Clark, W., & Zhang, Z. (2019). Repeater-enhanced distributed quantum sensing based on continuous-variable multipartite entanglement. Physical Review A, 99(1), 012328.
JournalPHYSICAL REVIEW A
Rights©2019 American Physical Society
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractEntanglement is a unique resource for quantum-enhanced applications. When employed in sensing, shared entanglement between distributed quantum sensors enables a substantial gain in the measurement sensitivity in estimating global parameters of the quantum sensor network. Loss incurred in the distribution of entanglement, however, quickly dissipates the measurement-sensitivity advantage enjoyed by the entangled quantum sensors over sensors supplied with local quantum resources. Here we present a viable approach to overcome the entanglement-distribution loss and show that the measurement sensitivity enabled by entangled quantum sensors beats that afforded by the optimum local resource. Our approach relies on noiseless linear amplifiers (NLAs) to serve as quantum repeaters. We show that, unlike the outstanding challenge of building quantum repeaters to suppress the repeaterless bound for quantum key distribution, NLA-based quantum repeaters for distributed quantum sensing are realizable by available technology. As such, distributed quantum sensing would become an application instance that benefits from quantum repeaters.
VersionFinal published version
SponsorsUniversity of Arizona; General Dynamics Mission Systems [18-BOA-SC-0003]; Nicolaas Bloembergen Graduate Student Scholarship; U.S. Department of Energy [PH-COMPHEP-KA24]