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arXiv 1610.03329cond-mat.mes-hallquant-ph
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压缩微波磁共振

Magnetic resonance with squeezed microwaves

A. Bienfait, P. Campagne-Ibarcq, A. Holm-Kiilerich, X. Zhou, S. Probst, J. J. Pla, T. Schenkel, D. Vion, D. Esteve, J. J. L. Morton, K. Moelmer, P. Bertet

摘要:

电磁场的真空波动对各种测量的灵敏度设置了基本限制,包括磁共振光谱。我们报告使用压缩微波场,这是工程量子态的光,在一个字段正交的波动减少到真空水平以下,以提高检测灵敏度的电子自旋在毫开尔文温度的合奏。通过在含有自旋的微波谐振器的输入端口上照射压缩真空态,与真空输入的情况相比,我们在谱仪输出处获得了$1.2$ \,dB的噪声降低。这一结果为量子精密测量在磁共振波谱学中的应用提供了理论依据。

英文摘要:

Vacuum fluctuations of the electromagnetic field set a fundamental limit to the sensitivity of a variety of measurements, including magnetic resonance spectroscopy. We report the use of squeezed microwave fields, which are engineered quantum states of light for which fluctuations in one field quadrature are reduced below the vacuum level, to enhance the detection sensitivity of an ensemble of electronic spins at millikelvin temperatures.} By shining a squeezed vacuum state on the input port of a microwave resonator containing the spins, we obtain a $1.2$\,dB noise reduction at the spectrometer output compared to the case of a vacuum input. This result constitutes a proof of principle of the application of quantum metrology to magnetic resonance spectroscopy.

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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