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arXiv 1807.03643quant-phcond-mat.mtrl-sciphysics.optics
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具有长寿命自旋相干性的三维固态量子比特阵列

Three-dimensional solid-state qubit arrays with long-lived spin coherence

C. J. Stephen, B. L. Green, Y. N. D. Lekhai, L. Weng, P. Hill, S. Johnson, A. C. Frangeskou, P. L. Diggle, M. J. Strain, E. Gu, M. E. Newton, J. M. Smith, P. S.… 展开作者

C. J. Stephen, B. L. Green, Y. N. D. Lekhai, L. Weng, P. Hill, S. Johnson, A. C. Frangeskou, P. L. Diggle, M. J. Strain, E. Gu, M. E. Newton, J. M. Smith, P. S. Salter, G. W. Morley

摘要:

硅晶体管的三维阵列增加了比特的密度。固态量子比特要大得多,因此可以从使用第三维中受益更多,因为有用的容错量子计算将需要至少10万个物理量子比特,甚至可能是10亿个。在这里,我们使用激光写入在金刚石中创建氮空位中心(NVC)量子位的3D阵列。这将允许500万个量子位在商业上可用的4.5x4.5x0.5 mm金刚石内,基于每个NVC的五个核量子位,并允许每个NVC的$(10 μm)^3$为我们的激光写入电气控制留下空间。我们测量的自旋相干时间比以前的激光写入量子比特长一个数量级,至少与非激光写入的NVC一样长。与NVC量子计算一样,量子通信和纳米级传感也可以从同一平台中受益。我们的方法也可以扩展到金刚石和碳化硅中的其他量子位。

英文摘要:

Three-dimensional arrays of silicon transistors increase the density of bits. Solid-state qubits are much larger so could benefit even more from using the third dimension given that useful fault-tolerant quantum computing will require at least 100,000 physical qubits and perhaps one billion. Here we use laser writing to create 3D arrays of nitrogen-vacancy centre (NVC) qubits in diamond. This would allow 5 million qubits inside a commercially available 4.5x4.5x0.5 mm diamond based on five nuclear qubits per NVC and allowing $(10 μm)^3$ per NVC to leave room for our laser-written electrical control. The spin coherence times we measure are an order of magnitude longer than previous laser-written qubits and at least as long as non-laser-written NVC. As well as NVC quantum computing, quantum communication and nanoscale sensing could benefit from the same platform. Our approach could also be extended to other qubits in diamond and silicon carbide.

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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