Quantum jump metrology

Lewis A. Clark, Adam Stokes, and Almut Beige
Phys. Rev. A 99, 022102 – Published 4 February 2019

Abstract

Quantum metrology exploits quantum correlations in specially prepared entangled or other nonclassical states to perform measurements that exceed the standard quantum limit. Typically, though, such states are hard to engineer, particularly when larger numbers of resources are desired. As an alternative, this paper aims to establish quantum jump metrology, which is based on generalized sequential measurements as a general design principle for quantum metrology and discusses how to exploit open quantum systems to obtain a quantum enhancement. By analyzing a simple toy model, we illustrate that parameter-dependent quantum feedback can indeed be used to exceed the standard quantum limit without the need for complex state preparation.

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  • Received 2 November 2018

DOI:https://doi.org/10.1103/PhysRevA.99.022102

©2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Lewis A. Clark1,2, Adam Stokes1,3, and Almut Beige1

  • 1The School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom
  • 2Joint Quantum Centre Durham-Newcastle, School of Mathematics, Statistics and Physics, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom
  • 3School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom

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Issue

Vol. 99, Iss. 2 — February 2019

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