提升扫描隧道显微镜的能量分辨率：从动态库仑阻塞到腔量子电动力学
Enhancing the Energy Resolution in Scanning Tunneling Microscopy: from dynamical Coulomb blockade to cavity quantum electrodynamics
AI总结：
通过结合电磁屏蔽和低通滤波，提升扫描隧道显微镜能量分辨率至3.7μeV，揭示原子尺度隧穿过程与宏观腔量子电动力学的联系。
摘要：
扫描隧道显微镜和光谱技术已成为研究凝聚态物质在原子尺度上不可或缺的工具，但实现终极能量分辨率仍是一个持续的挑战。在mK温度下，动态库仑阻塞区域通过隧穿电子与电磁环境之间的能量交换从根本上限制了光谱精度。在这里，我们证明通过在低温扫描头直接结合局部电磁屏蔽和低通滤波器，可以将能量分辨率提高近一个数量级，达到基准值，最低可达3.7μeV在10mK下。我们将这种增强归因于高效抑制高频辐射和隧道结的电容分流。令人惊奇的是，这种改进的灵敏度揭示了约瑟夫森电流与厘米级扫描头的电磁腔模式耦合，建立了原子尺度隧穿过程与宏观腔量子电动力学之间的直接联系。这些进步为探索前所未有的精度的超低能现象开辟了道路。
英文摘要：
Scanning tunneling microscopy and spectroscopy have become indispensable tools for probing condensed matter at atomic length scales, yet achieving ultimate energy resolution remains a persistent challenge. At mK temperatures, the dynamical Coulomb blockade regime fundamentally limits spectroscopic precision through energy exchange between tunneling electrons and the electromagnetic environment. Here, we demonstrate that combining local electromagnetic shielding with low-pass filtering directly at the cryogenic scan head improves the energy resolution by nearly an order of magnitude, reaching benchmark values as low as 3.7$μ$eV at 10mK. We attribute this enhancement to efficient suppression of high-frequency radiation and capacitive shunting of the tunnel junction. Remarkably, this improved sensitivity reveals that the Josephson current couples to electromagnetic cavity modes of the centimeter-scale scan head, establishing a direct connection between atomic-scale tunneling processes and macroscopic cavity quantum electrodynamics. These advances open pathways for exploring ultra-low-energy phenomena with unprecedented 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。
