Time-reversal and super-resolving phase measurements

K. J. Resch, K. L. Pregnell, R. Prevedel, A. Gilchrist, G. J. Pryde, J. L. O'Brien, A. G. White

Research output: Contribution to journalArticlepeer-review

195 Citations (Scopus)

Abstract

We demonstrate phase super-resolution in the absence of entangled states. The key insight is to use the inherent time-reversal symmetry of quantum mechanics: our theory shows that it is possible to measure, as opposed to prepare, entangled states. Our approach is robust, requiring only photons that exhibit classical interference: we experimentally demonstrate high-visibility phase super-resolution with three, four, and six photons using a standard laser and photon counters. Our six-photon experiment demonstrates the best phase super-resolution yet reported with high visibility and resolution.

Original languageEnglish
Article number223601
JournalPhysical Review Letters
Volume98
Issue number22
DOIs
Publication statusPublished - 31 May 2007
Externally publishedYes

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