Key Laboratory for Quantum Information and Measurements, Department of Physics, Tsinghua University, Beijing 100084, China; Center for Quantum Information, Tsinghua University, Beijing 100084, China
Abstract The influence of the disturbance caused by the imperfection of the engineering coupling constants in the perfect state transfer is calculated. The results show that the fidelity for the perfect state transfer is seriously affected by the errors occurring near the input and output spins. Such results are helpful for the realization of the perfect state transfer in the case where there exist errors in experiments.
Received: 24 May 2005
Revised: 21 July 2005
Accepted manuscript online:
PACS:
03.67.Lx
(Quantum computation architectures and implementations)
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