2025/11/20 by Andrew J. Groszek, Groszek, Andrew J., Charles Woffinden +7
Physics and Astronomy · #Space Science and Extraterrestrial Life #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena
paper · pdf · doi:10.48550/arxiv.2511.16710
All modern wireless communication technologies are based on electromagnetism. However, electromagnetic signals are susceptible to screening and blocking, so their availability cannot be guaranteed in adverse environments. This raises a fundamental question: Can information be transmitted through a truly unblockable channel? Here we show that gravity, unlike electromagnetism, offers such a path. We propose and implement a wireless communication protocol in which a broadcaster encodes a binary message by moving a mass, while a receiver detects the resulting gravitational signal with a gravimeter. We validate this scheme experimentally, successfully transmitting a gravitational message a distance of ≈ 0.7 m through a brick wall at a rate of 1 bit min-1. These results establish gravity as a viable platform for unblockable communication.