Non-local detection of coherent Yu-Shiba-Rusinov quantum projections

TL;DR

This paper demonstrates a novel non-local method to coherently project and manipulate Yu-Shiba-Rusinov quantum states using quantum corrals on a superconductor surface, enabling remote detection of hybrid quantum states.

Contribution

It experimentally achieves coherent projection and manipulation of Yu-Shiba-Rusinov states via quantum corrals, advancing remote quantum state detection techniques.

Findings

Successfully realized coherent projection of Yu-Shiba-Rusinov states.

Manipulated particle-hole composition by tuning corral eigenmodes.

Enabled non-local detection of magnet superconductor hybrid states.

Abstract

Probing spatially confined quantum states from afar - a long-sought goal to minimize external interference - has been proposed to be achievable in condensed matter systems via coherent projection. The latter can be tailored by sculpturing the eigenstates of the electron sea that surrounds the quantum state using atom-by-atom built cages, so-called quantum corrals. However, assuring the coherent nature of the projection, and manipulating its quantum composition, has remained an elusive goal. Here, we experimentally realize the coherent projection of a magnetic impurity-induced, Yu-Shiba-Rusinov quantum state using the eigenmodes of corrals on the surface of a superconductor, which enables us to manipulate the particle-hole composition of the projected state by tuning corral eigenmodes through the Fermi energy. Our results demonstrate a controlled non-local method for the detection of magnet superconductor hybrid quantum states.