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Q: Fachverband Quantenoptik und Photonik
Q 67: Poster – Quantum Information
Q 67.8: Poster
Donnerstag, 5. März 2026, 17:00–19:00, Philo 2. OG
High-fidelity quantum information processing with trapped barium ions via addressed off-resonant interactions — •Tommaso Faorlin1, Lorenz Panzl1, Phoebe Grosser1, Walter Joseph Hörmann1, Juris Ulmanis2, Thomas Feldker2, Alexander Erhard2, Giovanni Cerchiari1,3, Rainer Blatt1,2,4, and Thomas Monz1,2 — 1Universität Innsbruck, Technikerstraße 25/4, Innsbruck, 6020, Austria — 2Alpine Quantum Technologies (AQT) GmbH, 6020, Innsbruck, 6020, Austria — 3Naturwissenschaftlich-Technische Fakultät, Universität Siegen, Walter-Flex-Straße 3, 57068, Siegen, Germany — 4Institute for Quantum Optics and Quantum Information (IQOQI), 6020, Innsbruck, Austria
The Hyperion experiment aims at pushing the boundaries of coherent trapped-ion control. Our focus lies on improving gate fidelities and minimizing state-preparation and readout errors, in a quantum register of barium ions. Building on state preparation at the 1e-4 level, state readout at the 1e-5 level and single-ion addressing cross-talk on the 1e-4 level, I present a novel gate scheme, leveraging ground-state qubits with radially-addressed Raman interactions using 532 nm light. The entangling gates are mediated through the perpendicular, axial motional modes, utilizing the field gradient of the employed laser fields. This novel approach promises the low cross-talk from radial addressing in combination with improved gate performance offered by axial-mode mediated gates.
Keywords: Transverse gradient; Light shift; Entangling gate; Off-resonant operations; Trapped barium ions