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Enhancement of entanglement transfer in a spin chain by phase-shift control

par Maruyama, Koji ;Iitaka, Toshiaki;Nori, Franco
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 75, 1, 012325
Publication Publié, 2007

Article révisé par les pairs

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Résumé :

We study the effect of a phase shift on the amount of transferable two-spin entanglement in a spin chain. We consider a ferromagnetic Heisenberg or XY spin chain, both numerically and analytically, and two mechanisms to generate a phase shift, the Aharonov-Casher effect, and the Dzyaloshinskii-Moriya interaction. In both cases, the maximum attainable entanglement is shown to be significantly enhanced, suggesting its potential usefulness in quantum information processing. © 2007 The American Physical Society.