Quantum optical spanner: Twisting superconductors with vortex beam via Higgs mode
Phys. Rev. B 112, 214315 – Published 16 December, 2025
DOI: https://doi.org/10.1103/cj3p-jqxg
Abstract
Light carrying orbital angular momentum (OAM)—known as vortex beams—has broadened the scope of understanding and applications of light's angular momentum. Optical tweezers using OAM, often referred to as optical spanners, have significantly expanded the tunability of optical manipulation. A key frontier now lies in understanding how vortex beams interact with quantum states of matter. In this work, we numerically investigate the dynamics of a superconductor under vortex beam illumination and demonstrate the transfer of angular momentum from light to the superconducting collective mode, resulting in mechanical rotation. Our findings open a pathway for optical manipulation in the quantum regime, which we term the quantum optical spanner.
