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

*Corresponding author for this work

Research output: Contribution to journalArticle

181 Citations (Scopus)


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
Pages (from-to)1-4
Number of pages4
JournalPhysical Review Letters
Issue number22
Publication statusPublished - 31 May 2007
Externally publishedYes

Fingerprint Dive into the research topics of 'Time-reversal and super-resolving phase measurements'. Together they form a unique fingerprint.

  • Cite this

    Resch, K. J., Pregnell, K. L., Prevedel, R., Gilchrist, A., Pryde, G. J., O'Brien, J. L., & White, A. G. (2007). Time-reversal and super-resolving phase measurements. Physical Review Letters, 98(22), 1-4. [223601]. https://doi.org/10.1103/PhysRevLett.98.223601