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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 17 — Aug. 13, 2012
  • pp: 18869–18875

Weak interference in the high-signal regime

Juan P. Torres, Graciana Puentes, Nathaniel Hermosa, and Luis Jose Salazar-Serrano  »View Author Affiliations

Optics Express, Vol. 20, Issue 17, pp. 18869-18875 (2012)

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Weak amplification is a signal enhancement technique which is used to measure tiny changes that otherwise cannot be determined because of technical limitations. It is based on: a) the existence of a weak interaction which couples a property of a system (the system) with a separate degree of freedom (the pointer), and b) the measurement of an anomalously large mean value of the pointer state (weak mean value), after appropriate pre-and post-selection of the state of the system. Unfortunately, the weak amplification process is generally accompanied by severe losses of the detected signal, which limits its applicability. However, we will show here that since weak amplification is essentially the result of an interference phenomena, it should be possible to use the degree of interference (weak interference) to get relevant information about the physical system under study in a more general scenario, where the signal is not severely depleted (high-signal regime).

© 2012 OSA

OCIS Codes
(030.1670) Coherence and statistical optics : Coherent optical effects
(270.0270) Quantum optics : Quantum optics
(350.7420) Other areas of optics : Waves

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: May 1, 2012
Revised Manuscript: June 17, 2012
Manuscript Accepted: June 18, 2012
Published: August 2, 2012

Juan P. Torres, Graciana Puentes, Nathaniel Hermosa, and Luis Jose Salazar-Serrano, "Weak interference in the high-signal regime," Opt. Express 20, 18869-18875 (2012)

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