Year: 2025
Type: article
Abstract: Quantum control techniques play an important role in manipulating and harnessing the properties of different quantum systems, including isolated atoms. Here, we propose to achieve quantum control over a single on-surface atomic spin using Landau-Zener-Stückelberg-Majorana (LZSM) interferometry implemented with scanning tunneling microscopy (STM). Specifically, we model how the application of time-dependent, nonresonant ac electric fields across the STM tip-surface gap makes it possible to achieve precise quantum state manipulation in an isolated Fe^{2+} ion on a MgO/Ag(100) surface. We propose a protocol to combine Landau-Zener tunneling with LZSM interferometry that permits one to measure the quantum spin tunneling of an individual Fe^{2+} ion. The proposed experiments can be implemented with ESR-STM instrumentation, opening a new venue in the research of on-surface single spin control.
Source: Physical Review Letters
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Consejo Nacional de Investigaciones Científicas y Técnicas, Generalitat Valenciana, Ministerio de Ciencia e Innovación, Universidad Nacional del Nordeste, Fundação para a Ciência e a Tecnologia, Agencia Nacional de Promoción Científica y Tecnológica
OpenAlex ID: W4407239993