Eliminating interactions between non-neighboring qubits in the preparation of cluster states in quantum molecules
Eliminating interactions between non-neighboring qubits in the preparation of cluster states in quantum molecules
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DOI：
10.1140/epjb/e2008-00053-9
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发表时间：
2007-03
期刊：
影响因子：
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通讯作者：
G. Guo;X. Hao;T. Tu;Zhilan Zhu;Guang-can Guo
中科院分区：
文献类型：
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作者：
G. Guo;X. Hao;T. Tu;Zhilan Zhu;Guang-can Guo
提出了一种消除双点分子制备团簇态时非近邻量子位效应的方案。由于量子位之间的相互作用哈密顿量是伊辛模型的，并且相互对易，通过适当改变量子点分子的电子电荷态，可以得到量子位之间的正负有效相互作用，从而抵消非最近邻量子位的影响。与不考虑非最近邻相互作用的方案相比，该方案的总时间仅为一维量子比特链的2倍和二维量子比特阵列的3倍.
We propose a scheme to eliminate the effect of non-nearest-neighbor qubits in preparing cluster state with double-dot molecules. As the interaction Hamiltonians between qubits are Ising-model and mutually commute, we can get positive and negative effective interactions between qubits to cancel the effect of non-nearest-neighbor qubits by properly changing the electron charge states of each quantum dot molecule. The total time for the present multi-step cluster state preparation scheme is only doubled for one-dimensional qubit chain and tripled for two-dimensional qubit array comparing with the time of previous protocol leaving out the non-nearest-neighbor interactions.