  Time-reversal symmetry breaking can enhance or suppress the probability of
success for quantum state transfer (QST), and remarkably it can be used to
implement the directional QST. In this paper we study the QST on a ring with
time-reversal asymmetry. We show that the system will behave as a quantum state
turnplate under some proper parameters, which may serve as time controlled
quantum routers in complex quantum networks. We propose to to realize the
quantum state turnplate in the coupled resonator optical waveguide by
controlling the coupling strength and the phase.
