Abstract

Device-independent quantum communication protocols and certified generation of random numbers provide new perspectives for a secure key distribution. These protocols require a rigorous violation of Bell’s inequality, which is achieved by evaluating correlations between measurement results of two entangled particles under strict experimental conditions. The requirements for a conclusive Bell test are a high detection efficiency of the measured particles together with space-like separation of the measurements. In the last two years a few experiments, using very different setups, were able to measure a violation of Bell’s inequality fulfilling these requirements. Yet none of experiments was able to fulfill the even higher experimental requirements for device-independent quantum communication.

© 2017 IEEE