中国物理B ›› 2008, Vol. 17 ›› Issue (2): 702-709.doi: 10.1088/1674-1056/17/2/057
邓洪亮, 方细明
Deng Hong-Liang(邓洪亮) and Fang Xi-Ming(方细明)†
摘要: This paper considers a generalized spin star system which can be solved exactly, with the central spin-$\ddfrac{1}{2}$ system embedded in an outer ring of $N$ spin-$\ddfrac{1}{2}$ particles(denoted as spin bath). In this model, in addition to the central-outer interaction, each pair of nearest neighbour of the bath interacts within themselves. The general expressions of the eigenstates as well as the eigenvalues of the model are derived with the use of the symmetries of system. It analyses the quantum state transfer and the dynamical behaviour of entanglement created during quantum communication. It also analyses the efficiency of the configuration regarded as quantum phase covariant clone or decoherence model. Some interesting results are discovered concerning the properties of quantum communication in this model.
中图分类号: (Quantum communication)