We produce a rubidium Bose-Einsten-condesate (BEC) in a spherical optical dipole trap with a temperature of  about 50 nK. We transfer the orbital-angular momentum (OAM) of optical field to ultracold atoms using the Raman coupling technique. On this special system, we will explore exotic OAM states in quantum gases and their potential applications in quantum processing and precision measurment. Some research directions are summarized as follows.

1. Spin-orbital-angular-momentum coupling (SOAMC) of ultracold quantum gases.
2. Superposition and entanglement of OAM states in quantum gases.
3. Precision measurement using the matter-wave OAM. 

• Isotropic expansion of a spherical Bose condensate

    We produce ⁶Li degenerate Fermi gases using the evaporative cooling in an optical dipole trap. We tune the interatomic interaction usiing the magnetic Feshbach resonance and load the ultracold Fermi gas in an isotropic optical trap. The main purpose is to explore nonequillibium behaviors of the strongly Fermi gas with the conformal or SO(2,1) symmetry. Some research directions are summarized as follows.

1.  Universal laws with the conformal symmetry
2.  Scale invariance of a quenched system
3.  Precision measurement with Li atoms

• Anisotroptic expansion of a unitary degenerate Fermi gas