Demonstration of Einstein-Podolsky-Rosen Steering Using Single-Photon Path Entanglement and Displacement-Based Detection
Thiago Guerreiro, F. Monteiro, Anthony Martin, Jonatan Bohr Brask, Tamás Vértesi, Boris A. Korzh, Misael Caloz, Félix Bussières, Varun Boehm Verma, Adriana E. Lita, Richard P. Mirin, Sae Woo Nam, F. Marsilli, Matthew D. Shaw, N. Gisin, Nicolas Brunner, Hugo Zbinden, Rob Thew · Physical Review Letters · 2016
We demonstrate the violation of an Einstein-Podolsky-Rosen steering inequality developed for single-photon path entanglement with displacement-based detection. We use a high-rate source of heralded single-photon path-entangled states, combined with high-efficiency superconducting-based detectors, in a scheme that is free of any postselection and thus immune to the detection loophole. This result conclusively demonstrates single-photon entanglement in a one-sided device-independent scenario, and opens the way towards implementations of device-independent quantum technologies within the paradigm of path entanglement.