Physics – Quantum Physics
Scientific paper
2008-12-06
Phys. Rev. Lett. 101, 200502 (2008)
Physics
Quantum Physics
close to the published version
Scientific paper
10.1103/PhysRevLett.101.200502
We introduce the concept of directional coupling, i.e., the selective
transfer of a state between adjacent quantum wires, in the context of quantum
computing and short-distance communication. Our analysis rests upon a
mathematical analogy between a dual-channel directional coupler and a composite
spin system.
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