Investigating the Effects of the Interaction Intensity in a Weak Measurement
Abstract
Measurements are crucial in quantum mechanics, in fundamental research as well as in applicative fields like quantum metrology, quantum-enhanced measurements and other quantum technologies. In the recent years, weak-interaction-based protocols like Weak Measurements and Protective Measurements have been experimentally realized, showing peculiar features leading to surprising advantages in several different applications. In this work we analyze the validity range for such measurement protocols, that is, how the interaction strength affects the weak value extraction, by measuring different polarization weak values measured on heralded single photons. We show that, even in the weak interaction regime, the coupling intensity limits the range of weak values achievable, putting a threshold on the signal amplification effect exploited in many weak measurement based experiments.
Keywords
Cite
@article{arxiv.1709.04869,
title = {Investigating the Effects of the Interaction Intensity in a Weak Measurement},
author = {Fabrizio Piacentini and Alessio Avella and Marco Gramegna and Rudi Lussana and Federica Villa and Alberto Tosi and Giorgio Brida and Ivo Pietro Degiovanni and Marco Genovese},
journal= {arXiv preprint arXiv:1709.04869},
year = {2018}
}