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Q: Fachverband Quantenoptik und Photonik
Q 54: Quantum Information (Quantum Repeater)
Q 54.5: Vortrag
Donnerstag, 17. März 2022, 15:00–15:15, Q-H12
Coherent manipulation of RF-dressed qubit states in a single 40Ca+ ion — •Pascal Baumgart, Hubert Lam, Stephan Kucera, and Jürgen Eschner — Universität des Saarlandes, Experimentalphysik, D-66123 Saarbrücken
Fluctuating environmental magnetic fields are detrimental for quantum coherence of Zeeman levels of single trapped ions, which may be utilised as stationary quantum bits in quantum communication protocols. By properly dressing the Zeeman levels, one may create magnetic field-independent qubits (clock transitions) [1]. We study the dressed manifolds of the S1/2 and D5/2 levels in a single 40Ca+ ion by Ramsey spectroscopy, combining RF and laser excitation (similar to [2]), with the perspective of storing quantum information in magnetic field-insensitive qubits with long coherence time.
[1] N. Aharon et al., New J. Phys. 21, 083040 (2019)
[2] K. N. Dietze, MSc Thesis, TU Braunschweig, (2019)