Bonn 2025 – scientific programme
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QI: Fachverband Quanteninformation
QI 36: Poster – Quantum Information (joint session QI/Q)
QI 36.3: Poster
Thursday, March 13, 2025, 17:00–19:00, Tent
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 atomic or molecular states, 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 2F7/20 manifold [2]. This work focuses on the preparation of such robust qubits with sequences of microwave pulses.
We present a theoretical description of the atom’s hyperfine structure and the transitions between hyperfine levels driven by time-dependent magnetic fields. We furthermore simulate the population dynamics driven by sequences of microwave pulses and optimise the pulse sequences in order to excite the desired codewords.
[1] Jain, Shubham P., et al. "Æ codes." arXiv preprint arXiv:2311.12324 (2023).
[2] Xiao, Di, et al. "Hyperfine structure of Yb+ 173: Toward resolving the Yb 173 nuclear-octupole-moment puzzle." Physical Review A 102.2 (2020): 022810.
Keywords: Robust encoding of quantum information; Hyperfine structure; Quantum control