Wang, Yingdan

Yingdan Wang received her PhD degree from the Chinese Academy of Sciences in 2006. After that, she has carried out postdoctoral research at various institutions in Japan, Switzerland and Canada. Currently she is a Professor of Physics at the Institute of Theoretical Physics, Chinese Academy of Sciences. Her research interests include quantum engineering and quantum phase transition in open quantum systems.

Hyperfine electronic bridge for the excitation of the isomeric state in 229Th nucleus

• Speaker: Yingdan Wang (Institute of Theoretical Physics, CAS, China)
• Event: Quantum Technology Workshop 2026

The 229Th nuclear isomer serves as a promising platform for quantum metrology based on nuclear optical transitions. In addition to direct optical excitation, the electronic bridge (EB) mechanism provides an efficient alternative pathway for nuclear state manipulation. Previous studies have demonstrated that hyperfine interactions play a crucial role in two-photon EB processes in 229Th3+ ions, achieving ultra-high fidelity isomeric population transfer via a STIRAP scheme [1]. However, by performing a full calculation that incorporates the complete hyperfine structure, we reveal that the hyperfine splitting in the isomeric 7p1/2 manifold significantly degrades the excitation probability by disrupting the two-photon resonance condition. To overcome this limitation, we propose to combine magic wavelength with quantum interference effects to effectively restoring high-fidelity isomeric excitation.