Two-band model as a quantum data bus for
quantum state transfer
佚名
【期刊名称】《中国科学》 【年(卷),期】2010(000)007
【摘要】We study the dynamics of an electron spin state transfer along a half-filled two-band model(TBM).It is shown that this solvable and realistic medium has an energy gap between the ground and first-excited states in the half-filled case.By connecting two qubits to two sites of the TBM,the system can accomplish a high-fidelity and long-distance quantum state transfer(QST).Moreover,numerical simulations have been performed for a finite system.The results show that the numerical and analytical results of the effective coupling strength agree well with each other.Furthermore,the investigation shows that the reduced density matrix also has high fidelity beyond the range of perturbation.
【总页数】5页(P.1266-1270)
【关键词】two-band;model;energy;gap;quantum;state;transfer;fidelity 【作者】佚名 【作者单位】; 【正文语种】英文 【中图分类】N
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Two-band model as a quantum data bus for quantum state transfer
