Experimental non-local generation of entanglement from independent sources

TL;DR

This paper reports an experimental demonstration of generating entanglement non-locally from two independent photon sources without interaction, verified by Bell inequality violation, advancing quantum information science.

Contribution

It introduces a novel interferometer setup enabling entanglement from independent sources without prior interaction, a significant step in quantum entanglement research.

Findings

Successful non-local entanglement generation from independent sources.

Violation of Bell's inequality with S-value of 2.54.

Entanglement verified with high statistical significance.

Abstract

We experimentally demonstrate a non-local generation of entanglement from two independent photonic sources in an ancilla-free process . Two bosons (photons) are entangled in polarization space by steering into a novel interferometer setup, in which they have never meet each other. The entangled photons are delivered to polarization analyzers in different sites, respectively, and a non-local interaction is observed. Entanglement is further verified by the way of the measured violation of a CHSH type Bell's inequality with S-values of 2.54 and 27 standard deviations. Our results will shine a new light into the understanding on how quantum mechanics works, have possible philosophic consequences on the one hand and provide an essential element for quantum information processing on the other hand. Potential applications of our results are briefly discussed.