Researchers discover shortcut to satellite-based quantum encryption network


Space Daily has the story Researchers discover shortcut to satellite-based quantum encryption network.

From the ground, researchers measured laser signals that originated from a satellite and traveled through Earth’s gravitational potential and the turbulent atmosphere. The successful characterization of quantum features under such conditions is a precondition for the implementation of a global quantum communication network using satellites that would link metropolitan area quantum networks on the ground.

I have blogged about various quantum mechanical issues. The issue at hand here is quantum entanglement. In particular, I thought I understood it in the post ‘Quantum teleportation’ breakthrough by DARPA-funded physicists. However, I still don’t feel comfortable that I really understand many of the details for practical use of the physics.

I can’t remember the book that I read about quantum entanglement, but perhaps it was The Age of Entanglement: When Quantum Physics Was Reborn. The title doesn’t sound as familiar as it should if this is the book.

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