4.6 Article

Estimation of a quantum interaction parameter using weak measurements: Theory and experiment

Journal

PHYSICAL REVIEW A
Volume 86, Issue 4, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.86.040102

Keywords

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Funding

  1. Japanese Society for the Promotion of Science, JSPS
  2. ARC Centre of Excellence
  3. Discovery Federation Fellow programs
  4. IARPA-funded US Army Research Office contract
  5. Marie Curie [PIEF-GA-2009-236345-PROMETEO]
  6. University of Queensland
  7. Grants-in-Aid for Scientific Research [24540427] Funding Source: KAKEN

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We investigate the estimation of a small interaction parameter from the outcomes of weak quantum measurements implemented by the interaction. The relation of weak values and sensitivity is explained and the different contributions of postselected results are identified using experimental data. The results show how weak values can be used to control the distribution of input state sensitivity between different postselected outcomes.

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