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Quantum-state transfer in spin chains via isolated resonance of terminal spins

Abstract

We propose a quantum-state transfer protocol in a spin chain that requires only the control of the spins at the ends of the quantum wire. The protocol is to a large extent insensitive to inhomogeneity caused by local magnetic fields and perturbation of exchange couplings. Moreover, apart from the free evolution regime, it allows one to induce an adiabatic spin transfer, which provides the possibility of performing the transfer on demand. We also show that the amount of information leaking into the central part of the chain is small throughout the whole transfer process (which protects the information sent from being eavesdropped) and can be controlled by the magnitude of the external magnetic field.

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Details

Category:
Magazine publication
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
PHYSICAL REVIEW A no. 89, pages 1 - 6,
ISSN: 1050-2947
Language:
English
Publication year:
2014
Bibliographic description:
Korzekwa K., Machnikowski P., Horodecki P.: Quantum-state transfer in spin chains via isolated resonance of terminal spins// PHYSICAL REVIEW A. -Vol. 89, nr. 062301 (2014), s.1-6
DOI:
Digital Object Identifier (open in new tab) 10.1103/physreva.89.062301
Verification:
Gdańsk University of Technology

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