Interference of dissociating wave packets in the I2 molecule driven by femtosecond laser pulses

The interference between two dissociating wave packets of the \textrmI₂ molecule driven by femtosecond laser pulses is theoretically studied by using the time-dependent quantum wave packet method. Both the internuclear distance- and velocity-dependent density functions are calculated and discussed. It is demonstrated that the interference pattern is determined by the phase difference and the delay time between two pump pulses. With two identical pulses with a delay time of 305~fs and a FWHM of 20~fs, more interference fringes can be observed, while with two pump pulses with a delay time of 80~fs and a FWHM of 20~fs, only a few interference fringes can be observed.