Quantum state transfer via a two-qubit Heisenberg XXZ spin model |
| |
Authors: | Jia Liu |
| |
Affiliation: | Department of Physics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
| |
Abstract: | Transfer of quantum states through a two-qubit Heisenberg XXZ spin model with a nonuniform magnetic field b is investigated by means of quantum theory. The influences of b, the spin exchange coupling J and the effective transfer time T=Jt on the fidelity have been studied for some different initial states. Results show that fidelity of the transferred state is determined not only by J, T and b but also by the initial state of this quantum system. Ideal information transfer can be realized for some kinds of initial states. We also found that the interactions of the z-component Jz and uniform magnetic field B do not have any contribution to the fidelity. These results may be useful for quantum information processing. |
| |
Keywords: | 03.67.Hk 03.65.Ud |
本文献已被 ScienceDirect 等数据库收录! |
|