Our main research interests are: the interaction between light and matter, to manipulate atoms and to explore the fundamental physics using atomic systems, including:
1. The implement of Laser cooling technology and High precision laser spectroscopy (such as NICE-OHSM, Noise-immune cavity-enhanced optical-heterodyne molecular spectroscopy), are for detecting the fundamental symmetry violation in atomic systems, such as: Time-reversal violation, and Parity non-conservation (PNC) that are mostly studied using a large scaled high-energy accelerators. However, with the latest laser spectroscopy technique, the AMO experiments, in the very low energy regime, can reach a comparable sensitivity with those high energy approaches. The very weak symmetry violation phenomena in atomic systems can be observed on an optical table. You could call it as a desktop high-energy experiments.
2. Ultracold collisions between ionic and neutral atoms and molecules have undergone a great development in the last few years. Such studies can unveil the secrets of charge transportation in the superconductivity, ultracold chemical reactions in interstellar astrophysics, and be as a candidate for quantum gates. Recently, the technologies of simultaneous trapping neutral and charged particle became feasible.
We proposal to build a hybrid trap for ionic and neutral K, Rb, K2, Rb2, KRb, based on our current neutral-only trap. Our trap is a small rectangular glass cell, which is suitable to build an ion trap (in the air, out of vacuum) to trap ions inside the vacuum chamber with a minimum modification. The ionic particles can be produced using the photoionization of the ultracold atoms (molecules) with a 405 nm blue laser. The collision rates are then studied by the optical dipole trap losses of the co-exiting atoms, which has been studied in our group.
3.The laser spectroscopy with excotic atom, muonic hydrogen, muonic helium, which is a international collabration CREMA, can reveal the secret of nuclear strcture, including the charge and magnetic radius. The precision is much superior to that of the electron-scattering. Its result will bring a large impact to the nuclear physics, and may lead to the New physics. We have found a unexpected smaller proton size (the proton size puzzele). Now, this experiment is aiming on muonic helium.
Physics Building Room 307,308,309
Tel: 33295 and 42277
