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arXiv quant-ph/0406117quant-phphysics.atom-ph
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磁相互作用原子的量子计算

Quantum computing with magnetically interacting atoms

Andrei Derevianko, Caleb C. Cannon

摘要:

我们提出了一个可扩展的量子计算架构的基础上限制在一个紧密的光晶格的网站的冷原子。晶格被放置在非均匀磁场中,由此产生的塞曼子能级定义了量子比特状态。微波脉冲调谐到空间相关的谐振频率用于个人寻址。原子通过磁偶极相互作用相互作用,允许实现通用的受控非门。碱金属的门操作时间为毫秒级,比预期的退相干时间快得多。单个量子位操作大约需要10微秒。分析了非操作引起的运动退相干。我们还评论了改进的可行性与复杂的开壳层原子,如铬,铕和亚稳态碱土金属原子具有较大的磁矩的建议架构。

英文摘要:

We propose a scalable quantum-computing architecture based on cold atoms confined to sites of a tight optical lattice. The lattice is placed in a non-uniform magnetic field and the resulting Zeeman sublevels define qubit states. Microwave pulses tuned to space-dependent resonant frequencies are used for individual addressing. The atoms interact via magnetic-dipole interactions allowing implementation of a universal controlled-NOT gate. The resulting gate operation times for alkalis are on the order of milliseconds, much faster then the anticipated decoherence times. Single qubit operations take about 10 microseconds. Analysis of motional decoherence due to NOT operations is given. We also comment on the improved feasibility of the proposed architecture with complex open-shell atoms, such as Cr, Eu and metastable alkaline-earth atoms with larger magnetic moments.

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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