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Quantum enhanced estimation of a multidimensional field
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Baumgratz, Tillmann and Datta, Animesh (2016) Quantum enhanced estimation of a multidimensional field. Physical Review Letters, 116 (3). 030801 . doi:10.1103/PhysRevLett.116.030801 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.116.030801
Abstract
We present a framework for the quantum enhanced estimation of multiple parameters corresponding to noncommuting unitary generators. Our formalism provides a recipe for the simultaneous estimation of all three components of a magnetic field. We propose a probe state that surpasses the precision of estimating the three components individually, and we discuss measurements that come close to attaining the quantum limit. Our study also reveals that too much quantum entanglement may be detrimental to attaining the Heisenberg scaling in the estimation of unitarily generated parameters.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QC Physics | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Library of Congress Subject Headings (LCSH): | Magnetic fields | ||||||||
Journal or Publication Title: | Physical Review Letters | ||||||||
Publisher: | American Physical Society | ||||||||
ISSN: | 0031-9007 | ||||||||
Official Date: | 21 January 2016 | ||||||||
Dates: |
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Volume: | 116 | ||||||||
Number: | 3 | ||||||||
Article Number: | 030801 | ||||||||
DOI: | 10.1103/PhysRevLett.116.030801 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 24 February 2020 | ||||||||
Date of first compliant Open Access: | 24 February 2020 |
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