A Rout to Protect Quantum Gates constructed via quantum walks from Noises.

A Rout to Protect Quantum Gates constructed via quantum walks from Noises.
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保护通过量子行走构建的量子门免受噪声影响的路线

DOI:
10.1038/s41598-018-25550-1
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发表时间:
2018-05-08
期刊:
影响因子:
4.6
通讯作者:
Li YQ
Li YQ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Du YM;Lu LH;Li YQ

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研究了中心为在格势的奇数格点一维图上的连续时间量子行走。我们证明了当势远大于跳变强度时,这种量子行走系统可以构造一个单量子比特的X门,也可以构造一个双量子比特的控制门。我们研究了退相干效应,发现增加图上的点数或增加势与跳变强度的比值都可以提高相干时间,这有望激发长相干时间量子门的设计.我们还提出了几个实验的建议,以实现这样的系统。
The continuous-time quantum walk on a one-dimensional graph of odd number of sites with an on-site potential at the center is studied. We show that such a quantum-walk system can construct anX-gate of a single qubit as well as a control gate for two qubits, when the potential is much larger than the hopping strength. We investigate the decoherence effect and find that the coherence time can be enhanced by either increasing the number of sites on the graph or the ratio of the potential to the hopping strength, which is expected to motivate the design of the quantum gate with long coherence time. We also suggest several experimental proposals to realize such a system.
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