Experimental test of the no signaling theorem
Tiziano De Angelis, Francesco De Martini, Eleonora Nagali, and Fabio, Sciarrino
TL;DR
This paper reports the first experimental test of Herbert's 1981 no-signaling theorem proposal, demonstrating that quantum nonlocality cannot be used for faster-than-light communication, with detailed theoretical and experimental analysis.
Contribution
It provides the first experimental realization of Herbert's FTL communication proposal and explains why such schemes fail due to fundamental quantum principles.
Findings
No faster-than-light communication was achieved.
Experimental results support the no-signaling theorem.
Theoretical analysis clarifies the limitations of quantum nonlocality for FTL communication.
Abstract
In 1981 N. Herbert proposed a gedanken experiment in order to achieve by the ''First Laser Amplified Superluminal Hookup'' (FLASH) a faster than light communication (FTL) by quantum nonlocality. The present work reports the first experimental realization of that proposal by the optical parametric amplification of a single photon belonging to an entangled EPR pair into an output field involving 5 x 10^3 photons. A thorough theoretical and experimental analysis explains in general and conclusive terms the precise reasons for the failure of the FLASH program as well as of any similar FTL proposals.
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