Eur. Phys. J. B 74, 373-378 (2010)
https://doi.org/10.1140/epjb/e2010-00088-3

Coherently manipulating flying qubits in a quantum wire with a magnetic impurity

Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, 410081, Changsha, P.R. China

Corresponding author: zzhoulan@gmail.com

Received: 29 June 2009
Revised: 19 November 2009
Published online: 9 March 2010

Abstract

We study the effect of a magnetic impurity with spin-half on a single propagating electron in a one-dimensional model system via the tight-binding approach. Due to the spin-dependent interaction, the scattering channel for the flying qubit is split, and its transmission spectrum is obtained. It is found that, the spin orientation of the impurity plays the role as a spin state filter for a flying qubit.