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arXiv 2602.11233physics.atom-ph
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量子计算中的磁共振及原子和分子核矩的精确测量

Magnetic resonance in quantum computing and in accurate measurements of the nuclear moments of atoms and molecules

University of Central Florida(中佛罗里达大学);U. S. Air Force Research Laboratory(美国空军研究实验室)

Zhichen Liu, Richard A. Klemm

AI总结:

本文提出通过NMR/EPR技术高精度测量原子和分子核矩,并用于量子计算中的磁共振研究。

摘要:

现代实验技术可以生成形如H(t) = H0 z-hat + H1 [x-hat cos(ωt) + y-hat sin(ωt)]的磁场,其频率在核磁共振(NMR)和电子顺磁共振(EPR)频率ωn0和ωe0的数量级范围内,当作用于原子或分子时。我们推导出简单的闭合形式表达式,用于精确的核和电子自旋波函数,使原子或分子能够实现受控的纠缠态转换,从而作为量子计算机发挥作用。这些解还使能够精确测量原子和分子的核矩。我们给出了与14N、7Li和133Cs核矩测量相关的示例。由于现有133Cs的最低三个核矩的超精细测量相互不一致,所提出的NMR/EPR实验为以高精度测量其所有七个核矩提供了途径。

英文摘要:

Modern experimental techniques can generate magnetic fields of the form H(t) = H0 z-hat + H1 [x-hat cos(ωt) + y-hat sin(ωt)], at frequencies within an order of magnitude of the nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR) frequencies, ωn0 and ωe0, respectively, when acting on atoms or molecules. We derive simple closed-form expressions for the exact nuclear- and electronic-spin wave functions that enable controlled transitions between entangled states, allowing an atom or molecule to function as a quantum computer. These solutions also enable precise NMR or EPR measurements of nuclear moments in atoms and molecules. We present examples relevant to measurements of the nuclear moments of 14N, 7Li, and 133Cs. Because existing hyperfine measurements of the lowest three nuclear moments of 133Cs are mutually inconsistent, the proposed NMR/EPR experiments provide a route to measuring all seven of its nuclear moments with high precision.

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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