Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1866135 | Physics Letters A | 2008 | 4 Pages |
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=JtT=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 JzJz and uniform magnetic field B do not have any contribution to the fidelity. These results may be useful for quantum information processing.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Jia Liu, Guo-Feng Zhang, Zi-Yu Chen,