Controlled Quantum State Transfer in a Spin Chain

Details Controlled Quantum State Transfer in a Spin Chain Controlled Quantum State Transfer in a Spin Chain

2007-02-28

arxiv.org/abs/quant-ph/0702265v1

Phys. Rev. A 75, 032331 (2007)

Physics

Quantum Physics

6 pages, 3 figures, to appear in Physical Review A

Scientific paper

Control of the transfer of quantum information encoded in quantum wavepackets moving along a spin chain is demonstrated. Specifically, based on a relationship with control in a paradigm of quantum chaos, it is shown that wavepackets with slow dispersion can automatically emerge from a class of initial superposition states involving only a few spins, and that arbitrary unspecified travelling wavepackets can be nondestructively stopped and later relaunched with perfection. The results establish an interesting application of quantum chaos studies in quantum information science.

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