Advancements in Quantum-Limited Timing for Geosynchronous Satellites

Scientists have successfully transmitted time signals across 300 kilometers with an accuracy and precision limited only by the quantum nature of photons. This breakthrough could revolutionize high-precision science using satellites, including satellite navigation and fundamental-physics experiments that test the general theory of relativity. The time signals from atomic clocks can now be transmitted between Earth and satellites without compromising their precision and accuracy.