论文标题
部分可观测时空混沌系统的无模型预测
Highly sensitive measurement of a megahertz rf electric field with a Rydberg-atom sensor
论文作者
论文摘要
Rydberg原子在电场测量中具有巨大的潜力，并且具有从KHz到THZ量表的频率带宽的优势。然而，测量弱MHz电场信号的灵敏度受光谱分辨率的限制，因为弱电场仅诱导Rydberg原子的种群和能级变化的少量扰动。在这里，我们报告使用热原子系统中用电磁诱导的透明度对弱MHz电场进行了高度敏感的测量。我们在30 MHz电场上使用杂差法，我们成功地测量了最小电场强度为\ TextColor {Black} {37.3 $ \ Mathrm {μV/CM} $}，其敏感性高达65 db的$ -65 $ dbm/hz和线性动态范围高达65 db。此外，我们测量了一个振幅调节的信号，并以98 \％的保真度来解码信号。这项工作扩展了原子传感器对测量MHz电场的敏感性，该电场进步了原子电场传感技术。
Rydberg atoms have great potential in electric field measurement and have an advantage with a large frequency bandwidth from the kHz to the THz scale. However, the sensitivity for measuring a weak MHz electric field signal is limited by the spectroscopic resolution, because the weak electric field induces only a small perturbation of the population and energy level shift of the Rydberg atoms. Here, we report highly sensitive measurement of a weak MHz electric field using electromagnetically induced transparency with Rydberg atoms in a thermal atomic system. Using the heterodyne method on a 30-MHz electric field, we successfully measure the minimum electric field strength to be \textcolor{black}{37.3 $\mathrm{μV/cm}$} with a sensitivity up to $-65$ dBm/Hz and a linear dynamic range over 65 dB. Additionally, we measure an amplitude-modulated signal and demodulate the signal with a fidelity over 98\%. This work extends the sensitivity of atomic sensors for measuring MHz electric fields, which advances atomic electric field-sensing technology.
