Complementary weak-value amplification with concatenated postselections

Gerardo I. Viza, Julián Martínez-Rincón*, Wei Tao Liu, John C. Howell

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


We measure a transverse momentum kick in a Sagnac interferometer using weak-value amplification with two postselections. The first postselection is controlled by a polarization-dependent phase mismatch between both paths of the interferometer, and the second postselection is controlled by a polarizer at the exit port. By monitoring the dark port of the interferometer, we study the complementary amplification of the concatenated postselections, where the polarization extinction ratio is greater than the contrast of the spatial interference. In this case, we find an improvement in the amplification of the signal of interest by introducing a second postselection to the system.

Original languageAmerican English
Article number043825
JournalPhysical Review A
Issue number4
StatePublished - 17 Oct 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2016 American Physical Society.


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