Directed quantum communication

Details Directed quantum communication Directed quantum communication

2009-10-09

arxiv.org/abs/0910.1745v2

Physics

Quantum Physics

Scientific paper

We raise the question whether there is a way to characterize the quantum information transport properties of a medium or material. For this analysis we find that the special features of quantum information has to be taken into account; quantum communication over an isotropic medium, as opposed to classical information transfer, requires the sender to direct the signal towards the receiver. As a consequence, the medium's capacity for quantum communication can be characterized in terms of how the size of the transmitter and receiver have to scale with the transmission distance to maintain quantum information transmission. To demonstrate the applicability of this concept, an n-dimensional spin lattice is considered, yielding a sufficient scaling of d^(n/3) with the distance d.

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