We are an experimental research group in the Department of Physics, Chonnam National University. Our group is divided by two research parts; First, magneto-optical trap system to investigate nonlinear, nonequilibrium, and collective dynamics. Second, the manipulation of neutral atoms as quantum qubit in optical lattices to study fundamental quantum mechanics and to develop the future quantum technology. The cold atoms trapped by atom-photon interactions are highly controllable and clean systems, presenting a new experimental field for quantum computing, quauntum simulators, quantum information science, and so on. Our goal is to exploit and interpret various cold atom systems to search for new states of matter and to address challenging problems in future quantum technology.