Phys. Rev. A 75, 032331 (2007) [6 pages]Controlled quantum-state transfer in a spin chainReceived 25 October 2006; revised 22 January 2007; published 23 March 2007 Control of the transfer of quantum information encoded in quantum wave packets moving along a spin chain is demonstrated. Specifically, based on a relationship with control in a paradigm of quantum chaos, it is shown that wave packets with slow dispersion can automatically emerge from a class of initial superposition states involving only a few spins, and that arbitrary unspecified traveling wave packets can be nondestructively stopped and later relaunched with perfection. The results establish an interesting application of quantum chaos studies in quantum information science. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.75.032331
DOI:
10.1103/PhysRevA.75.032331
PACS:
03.67.Hk, 05.45.Mt, 32.80.Qk, 75.10.Pq
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