Rovibrational manipulation of molecular quantum state by a train of ultrashort pulses

The rovibrational population transfer between two electronic states of the LiH molecule driven by a train of ultrashort pulses is theoretically investigated by solving the time-dependent Schrödinger equation. Theoretical calculation shows that the manipulation of selective rovibrational quantum state is completely possible by utilizing a train of ultrashort pulses with lower peak intensity ( 10 8 – 10 10 W / cm 2 ) . The rovibrational population transfer from an initial state to a selective rovibrational state is also controllable by changing the relative phase between two adjacent pulses of a pulse train. Moreover, the effect of rotational temperature on the population transfer is discussed.