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Q: Fachverband Quantenoptik und Photonik
Q 67: Poster – Quantum Information
Q 67.2: Poster
Thursday, March 5, 2026, 17:00–19:00, Philo 2. OG
Updates on the PTB two-qubit quantum computer — •Markus Duwe1,2, Hardik Mendpara1,2, Alexander Onkes1,2, and Christian Ospelkaus1,2 — 1Institut für Quantenoptik, Leibniz Universität Hannover — 2Physikalisch Technische Bundesanstalt, Braunschweig
We report the latest experimental results from the two-qubit quantum processor at PTB. We trap 9Be+ ions in a room temperature surface-electrode ion trap. We manipulate the qubits with microwaves generated by conductors embedded in the trap structure [1]. We describe updates to the experimental apparatus and present low heating rates. Individual ions are addressed via a micromotion sideband and the gate infidelity is characterized using randomized benchmarking [2]. We use a Mølmer-Sørensen type interaction to achieve Bell-state infidelities in the 10−3 range. Furthermore, we report progress towards combining these two gates to realize a universal gate set with improved performance compared with our previous measurements [3].
Keywords: Trapped ions; Quantum computing; Entanglement