Earth to Orbit: Quantum Signal Breakthrough

A groundbreaking study has demonstrated the feasibility of sending quantum signals from Earth up to orbiting satellites, reversing the conventional approach. This "uplink" method, previously dismissed due to anticipated atmospheric interference and signal loss, has been shown to be practical through advanced modeling.

The research, published in Physical Review Research by a team from the University of Technology Sydney, shows that ground-based equipment can leverage greater power and simpler servicing to produce stronger signals. This advancement is critical for developing future quantum networks, potentially linking quantum computers via satellite relays.

The findings, including simulations accounting for atmospheric effects and background light, suggest that an uplink is achievable. This could serve as a stepping stone towards a global quantum internet, with satellites acting as essential nodes for high-bandwidth quantum communication.