Chun-Chia Chen

• Atomic physics
• Quantum metrology
• Continuous optical clock
• Continuous atom laser

Dr. Chun-Chia Chen's laboratory had demonstrated a Sisyphus laser cooling scheme based on ultra- narrow linewidth (mHz-level) clock transitions. This approach constitutes a universal laser cooling technique applicable to all alkaline-earth(-like) atoms. These advances push the frontier of next- generation neutral-atom optical clocks, significantly improving their precision and stability. Dr. Chen plans to further extend these methods toward all-optical laser cooling of quantum-degenerate gases, including atomic Bose–Einstein condensates (BECs) and degenerate Fermi gases. The first continuous Bose–Einstein condensate was realized by producing an ultracold atomic ensemble via narrow-linewidth laser cooling of ground-state atoms, while simultaneously suppressing near-resonant interactions between the condensate and the cooling light through controlled ac- Stark shifts. This mechanism enables the maintenance of a continuous BEC. Dr. Chen's laboratory is currently exploring an alternative pathway, in which laser cooling and atomic confinement are implemented in long-lived metastable states. This approach represents a key step toward the realization of a continuous atom laser. In addition, Dr. Chen's laboratory is developing a novel Sisyphus laser cooling technique that stores ultracold ytterbium (Yb) atoms in metastable states for applications in Rydberg atom spectroscopy. The long-term goal is to prepare ultracold ytterbium atoms in long-lived circular Rydberg states, opening new possibilities for quantum information processing and quantum sensing.

• Ph.D., 2019, University of Amsterdam, Netherlands

• Postdoctoral Research Associate, National Institute of Standards and Technology, Boulder, USA (2020–2023)
• Postdoctoral Research Associate, RIKEN, Japan (2023–2024)
• Assistant Research Fellow, IAMS, Academia Sinica (2024– present)