Genuine Counterfactual Communication with a Nanophotonic Processor
Irati Alonso Calafell, Teodor Strömberg, David R. M. Arvidsson-Shukur, Lee A. Rozema, Valeria Saggio, C. Graganti, Nicholas C. Harris, Mihika Prabhu, Jacques Carolan, Michael Hochberg, Tom W. Baehr-Jones, Dirk Englund, C. H. W. Barnes, Philip John Walther · Conference on Lasers and Electro-Optics · 2019
In counterfactual communication particles and information can travel in opposite directions. With our high-fidelity programmable nanophotonic processor we implement the first trace-free counterfactual protocol without post-selection with a counterfactual violation as low as 2.4%.