Against Post-Selection in Counterfactual Communication

Yakir Aharonov, Lev Vaidman A

Teodor Strömberg, Irati Alonso Calafell, David R. M. Arvidsson-Shukur +11 more

In contrast to standard communication, counterfactual communication (CFC) counterintuitively allows information exchange without particle exchange. In this paper we use advances in integrated photonics to implement a CFC protocol that does not rely on post-selection.

Matthew Leifer, Robert W. Spekkens

Mohammad Bavarian, Dmitry Gavinsky, Tsuyoshi Ito

Irati Alonso Calafell, Teodor Strömberg, David R. M. Arvidsson-Shukur +11 more

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%.

Zhenghao Liu