Perfect state transfer in XX chains induced by boundary magnetic fields

Details Perfect state transfer in XX chains induced by boundary magnetic fields Perfect state transfer in XX chains induced by boundary magnetic fields

2011-11-11

arxiv.org/abs/1111.2686v2

Physics

Quantum Physics

Revised version, accepted for publication in Int. J. Quant. Inf

Scientific paper

A recent numerical study of short chains found near-perfect quantum state
transfer between the boundary sites of a spin-1/2 XX chain if a sufficiently
strong magnetic field acts on these sites. We show that the phenomenon is based
on a pair of states strongly localized at the boundaries of the system and
provide a simple quantitative analytical explanation.

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