Current Research Projects

P1. Molecular ions

This project centers on precision spectroscopy of trapped molecular ions, with the dual goals of developing advanced methodologies and conducting measurements that probe new physics beyond the Standard Model. Key techniques include Quantum Logic Spectroscopy (QLS), the Centripetally-Polarized Ions in a Ring with Quantum Logic (CIRQL) trap, and cutting-edge precision metrology. Together, these innovations enable a compact, tabletop experiment capable of exploring potential new particles or forces at energy scales exceeding the equivalent of 100 TeV—well beyond the reach of current high-energy colliders. -- More

P2. Neutral molecules

This project aims to develop advanced deceleration techniques for RaF molecules, with the ultimate goal of reducing their kinetic energy spread from hundreds of eV to the sub-meV range - an essential step toward enabling laser cooling and trapping. The key methodologies include cryogenic buffer-gas cooling, Rydberg Stark deceleration, and the use of negative ions. To expedite the technological development, we will first implement and optimize these techniques using BaF, a molecule that shares many chemical and spectroscopic properties with RaF but is more practical for preliminary studies. -- More

P3. Astrophysics

Understanding the birth of the universe and the evolution of the interstellar medium (ISM) is one of the most fundamental challenges. A central goal in astrophysics is to develop a comprehensive model that accurately describes ISM evolution across cosmic time. Modern computational models, informed by extensive astronomical and spectroscopic data, have advanced our ability to simulate the universe’s dynamical evolution. Yet discrepancies remain between theory and observation. Resolving these gaps requires more laboratory data, particularly precise reaction rate constants for key ISM processes and high-resolution spectroscopy of newly discovered molecules. -- More

P4. Technologies

Modern AMO physics advances hinge on custom instrumentation, innovative technology, and flexible control systems that outperform off-the-shelf solutions in precision, stability, and integration. Purpose-built designs offer economy and modularity, enabling reuse and adaptation across projects, while software-driven controls allow rapid reconfiguration to meet diverse experimental needs—maximizing both performance and resource efficiency. -- More