https://doi.org/10.1140/epjd/e2008-00023-5
Quantum teleportation via a two-qubit Heisenberg XXZ chain – effects of anisotropy and magnetic field
1
State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing, 100083, P.R. China
2
Department of Physics, School of Sciences, Beijing University of Aeronautics & Astronautics, Xueyuan Road No. 37, Beijing, 100083, P.R. China
Corresponding author: a gf1978zhang@buaa.edu.cn
Received:
17
July
2007
Revised:
8
November
2007
Published online:
20
February
2008
We study quantum teleportation via a two-qubit Heisenberg XXZ chain under an inhomogeneous magnetic field. We first consider entanglement teleportation, and then focus on the teleportation fidelity under different conditions. The effects of anisotropy and the magnetic field, both uniform and inhomogeneous, are discussed. We also find that, though entanglement teleportation does require an entangled quantum channel, a nonzero critical value of minimum entanglement is not always necessary.
PACS: 03.67.Lx – Quantum computation / 03.67.Hk – Quantum communication / 75.10.Jm – Quantized spin models
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008
