Quantum communication in spin star configuration

• 来源期刊: 中国物理B（英文版）
• 关键词: quantum state transfer phase covariant clone entanglement dynamics
• 年，卷（期）: 2008,（2）
• 页码范围: 702-709
• 页数: 8页
• 语种: 英文

摘要

This paper considers a generalized spin star system which can be solved exactly,with the central spin-1/2system embedded in an outer ring of N spm-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.