Liu C, Niu Q. Nonadiabatic effect in a quantum charge pump. Physical Review B. 1993;(19):13031-13034.

Thouless DJ, Ao P, Niu Q. Vortex dynamics in superfluids and the Berry phase. Physica A: Statistical Mechanics and its Applications. 1993;(1-4):42-49.

Liu C, Niu Q. Nonequilibrium effect in an electron turnstile. Physical Review B. 1993;(24):18320-18323.

Chang MC, Niu Q. Local density of states and level width for Wannier-Stark ladders. Physical Review B. 1993;(4):2215-2222.

Edwards HL, Niu Q, Lozanne DAL. A quantum-dot refrigerator. Applied Physics Letters. 1993;(13):1815-1817.