Effects of gravity on continuous-variable quantum key distribution
Roberto Pierini · Physical review. D/Physical review. D. · 2018
The domain of quantum technologies has been recently broadened to satellites orbiting the Earth. Long distance communication protocols cannot ignore the presence of the gravitational field and the effects on the quantum states. Here, we provide a general method to investigate how noninertial motion affects the performance of various quantum key distribution protocols for continuous-variable states of localized wave packets. Taking advantage of the equivalence principle, our results can be thought of as due to the gravitational field. We show that the consequences of gravity strongly depend on the configuration and the cryptographic scheme used.