Measuring Small Longitudinal Phase Shifts: Weak Measurements or Standard Interferometry?

Nicolas Brunner*, Christoph Simon

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

208 Citations (Scopus)

Abstract

Recently, weak measurements were used to measure small effects that are transverse to the propagation direction of a light beam. Here we address the question of whether weak measurements are also useful for measuring small longitudinal phase shifts. We show that standard interferometry greatly outperforms weak measurements in a scenario involving a purely real weak value. However, we also present an interferometric scheme based on a purely imaginary weak value, combined with a frequency-domain analysis, which may have the potential to outperform standard interferometry by several orders of magnitude.

Original languageEnglish
Article number010405
Number of pages4
JournalPhysical Review Letters
Volume105
Issue number1
DOIs
Publication statusPublished - 2 Jul 2010

Keywords

  • SPIN
  • COMPONENT
  • ENTANGLEMENT
  • REALIZATION
  • PARTICLE

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