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arXiv 1503.02376quant-ph
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QED电路辅助局域共振对氮空位系综的量子信息处理

Quantum information processing on nitrogen-vacancy ensembles with the local resonance assisted by circuit QED

Ming-Jie Tao, Ming Hua, Qing Ai, Fu-Guo Deng

摘要:

利用氮空位中心系综(NVE)与超导共面谐振器之间的局域共振相互作用和单量子比特操作,我们分别提出了两个远程NVE之间的状态转移和这些NVE上的快速受控相位(c相位)协议.该混合量子系统由两个远距离NVE耦合到分离的高Q传输线谐振器(TLR)组成,它们通过电流偏置的约瑟夫森结超导相位量子比特互连。在70.60 ns的操作时间内,我们的状态转移协议的保真度约为99.65%。在93.87 ns的工作时间内,我们的c相门的保真度约为98.23%。此外,利用c相位门,我们构造了一个二维的团簇态的NVE在n*n正方形网格的混合量子系统的单向量子计算。与基于超导谐振器的方案相比,由于NVE在室温下的长相干时间,我们的方案可能更鲁棒。

英文摘要:

With the local resonant interaction between a nitrogen-vacancy-center ensemble (NVE) and a superconducting coplanar resonator, and the single-qubit operation, we propose two protocols for the state transfer between two remote NVEs and for fast controlled-phase (c-phase) on these NVEs, respectively. This hybrid quantum system is composed of two distant NVEs coupled to separated high-Q transmission line resonators (TLRs), which are interconnected by a current-biased Josephsonjunction superconducting phase qubit. The fidelity of our state-transfer protocol is about 99.65% within the operation time of 70.60 ns. The fidelity of our c-phase gate is about 98.23% within the operation time of 93.87 ns. Furthermore, using the c-phase gate, we construct a two-dimensional cluster state on NVEs in n*n square grid based on the hybrid quantum system for the one-way quantum computation. Our protocol may be more robust, compared with the one based on the superconducting resonators, due to the long coherence time of NVEs at room temperature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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