Mainz 2026 – wissenschaftliches Programm

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

Q: Fachverband Quantenoptik und Photonik

Q 67: Poster – Quantum Information

Q 67.1: Poster

Donnerstag, 5. März 2026, 17:00–19:00, Philo 2. OG

Preparation and Control of Logical Qubits in the Hyperfine Structure of ¹⁷³Yb⁺ — •Selena-Maria Bota, Monika Leibscher, and Christiane P. Koch — Freie Universität Berlin, Berlin, Germany

Recent research proposes robust encoding of quantum information in high angular momentum states of atoms or molecules, where the logical qubits are protected against most common errors [1]. Such codewords can be built in the hyperfine structure of trapped ¹⁷³Yb⁺, namely using metastable states in the ²F_7/2⁰ manifold [2]. This work focuses on the preparation of such robust qubits with sequences of microwave pulses, specifically on simulating the population dynamics driven by the pulses and optimising them for better fidelity and time duration. The future aim is to devise a protocol for operational gates using the proposed codewords.

[1] Jain, Shubham P., et al. "Absorption-Emission Codes for Atomic and Molecular Quantum Information Platforms". Phys. Rev. Lett. 133 (2024), p. 260601.

[2] Xiao, Di, et al. "Hyperfine structure of ¹⁷³Yb⁺: Toward resolving the ¹⁷³Yb nuclear-octupole-moment puzzle." Phys. Rev. A 102 (2020), p. 022810.

Keywords: Robust encoding of quantum information; Hyperfine structure; Quantum control; Optimisation