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O: Fachverband Oberflächenphysik

O 89: Spins on surfaces at the atomic scale II

O 89.2: Vortrag

Donnerstag, 12. März 2026, 15:15–15:30, WILL/A317

Optimizing On-Surface Quantum Spins for Quantum Information Processing — •Denis Jankovic^1,2, Hoang-Anh Le^1,2, Saba Taherpour^1,3, and Christoph Wolf^1,2 — ¹Center for Quantum Nanoscience, Institute for Basic Science, Seoul, Republic of Korea — ²Ewha Womans University, Seoul, Republic of Korea — ³Departement of Physics, Ewha Womans University, Seoul, Republic of Korea

The bottom-up engineering of quantum-coherent spins on surfaces with STM enables atomically precise quantum logic in on-surface qubits, and atomic-scale multi-qubit devices.

We use optimal control on an open-system model of exchange-coupled surface spins to counter decoherence, static coupling, and imperfect initialization, identifying high-fidelity gates compatible with current ESR-STM constraints.

Finally, building on advances in electrically driven nuclear spins, we will outline ongoing experiments using lanthanides on surfaces, where ESR-STM manipulates hyperfine-coupled nuclear-spin manifolds as on-surface qudits.

Keywords: ESR-STM; Quantum optimal control; qudit; spin; lanthanide