Regensburg 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DS: Fachverband Dünne Schichten

DS 10: Gaede Prize Talks

DS 10.3: Preisträgervortrag

Dienstag, 6. September 2022, 11:00–11:30, H17

Quantum Science with Single Atoms and Molecules on Surfaces — •Philip Willke — Karlsruhe Institute of Technology, Physikalisches Institut, Karlsruhe, Germany — Laureate of the Gaede-Prize 2022

The quantum nature of a physical system often emerges from its fundamental building blocks and demands a profound understanding to harvest its advantages for quantum devices. In this talk, I will introduce a new architecture for coherent control of spins on surfaces, by combining electron spin resonance (ESR) and scanning tunneling microscopy (STM) [1]. This technique allows to address single atoms and molecules on surfaces with unprecedented energy resolution. Thus, it can be used to sense the magnetic coupling between spin centers on the nanoscale [2]. In addition, when scanning the STM tip across the surface it permits to perform magnetic resonance imaging on the atomic scale [3]. The high energy resolution also grants access to the hyperfine interaction between the electron and nuclear spin of different atomic species [4]. Recently, we could extend this technique also to spin resonance on individual molecules [5]. Lastly, by employing pulsed ESR schemes, a coherent manipulation of the surface spin becomes possible, for instance in Rabi and Hahn echo schemes [6]. This opens up a path towards quantum information processing and quantum sensing using atomic building blocks, including atoms and molecules. [1] S. Baumann et al., Science 350 (2015) [2] T. Choi et al. Nat. Nano 12 (2017) [3] P. Willke et al., Nat. Phys. 15 (2019) [4] P. Willke et al., Science 362 (2018) [5] X. Zhang et al., Nat. Chem. 14 (2022) [6] K. Yang et al., Science 366 (2019)