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We show how to communicate Heisenberg-limited continuous (quantum) variables between Alice and Bob in the case where they occupy two inertial reference frames that differ by an unknown Lorentz boost. There are two effects that need to be overcome: the ...

Optical communication channels over long distances have always been plagued by coherence loss and attenuation. This seriously compromises their use for quantum communication. Now, researchers from Innsbruck and Harvard have found a new and efficient way ...