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Heisenberg-scaling measurement protocol for analytic functions with quantum sensor networks

TitleHeisenberg-scaling measurement protocol for analytic functions with quantum sensor networks
Publication TypeJournal Article
Year of Publication2019
AuthorsK. Qian, Z. Eldredge, W. Ge, G. Pagano, C. Monroe, , and
JournalPhys. Rev. A
Volume100
Pagination042304
Date PublishedOCT 7
Type of ArticleArticle
ISSN2469-9926
Abstract

We generalize past work on quantum sensor networks to show that, for d input parameters, entanglement can yield a factor O(d) improvement in mean-squared error when estimating an analytic function of these parameters. We show that the protocol is optimal for qubit sensors, and we conjecture an optimal protocol for photons passing through interferometers. Our protocol is also applicable to continuous variable measurements, such as one quadrature of a field operator. We outline a few potential applications, including calibration of laser operations in trapped ion quantum computing.

DOI10.1103/PhysRevA.100.042304