近日，德国汉堡大学Wiebe, Jens团队报道了相干Yu-Shiba-Rusinov量子投影的非局域检测。该项研究成果发表在2025年11月26日出版的《自然—物理学》上。

远程探测空间受限的量子态——旨在最小化外部干扰的长期目标——此前被提出可通过凝聚态系统中量子态的相干投影来实现。这需要通过原子级构建的"量子围栏"来设计电子海的本征态。然而，验证投影的相干性及其量子成分的操控仍是重要目标。

研究组通过超导体表面围栏的本征模式，对由磁性杂质诱导的Yu-Shiba-Rusinov量子态的相干投影进行了演示。这使他们能够通过调节围栏本征模式（改变费米能）来操控投影态的粒子-空穴成分。该结果展示了一种可控的非局域方法，用于探测磁性-超导体杂化量子态。

附：英文原文

Title: Non-local detection of coherent Yu–Shiba–Rusinov quantum projections

Author: Ton, Khai That, Xu, Chang, Ioannidis, Ioannis, Schneider, Lucas, Posske, Thore, Wiesendanger, Roland, Morr, Dirk K., Wiebe, Jens

Issue&Volume: 2025-11-26

Abstract: Probing spatially confined quantum states from afar—a long-sought goal to minimize external interference—has been proposed to be feasible in condensed-matter systems through the coherent projection of the state. This can be achieved by engineering the eigenstates of the electron sea that surrounds the quantum state using cages built atom by atom, the so-called quantum corrals. However, the demonstration of the coherent nature of the projection and manipulation of its quantum composition are still important goals. Here we show this for the coherent projection of a Yu–Shiba–Rusinov quantum state that is induced by a magnetic impurity, using the eigenmodes of corrals on the surface of a superconductor. This enables us to manipulate the particle–hole composition of the projected state by tuning the corral eigenmodes through the Fermi energy. Our results demonstrate a controlled non-local method for the detection of magnet–superconductor hybrid quantum states.

DOI: 10.1038/s41567-025-03109-y

Source: https://www.nature.com/articles/s41567-025-03109-y