Diborane in laser field

As the frequency of polarized pulse laser, we choose those of IR and UV nonresonant region (the laser parameters used are summarized in Table 8.1). The choice of the IR laser is due to our recognition that the vibronic (electron-phonon) coupling must be particularly crucial in the time propagation of electron wavepackets and nuclear d3mamics under laser field. We will show that this is indeed the case, emphasizing the critical effect of the nuclear derivative (momentum) coupling elements. 

Laser field applied As stated above, we treat the electron-field interaction operator, in the velocity form as in Eq. (8.57) below. We further 

HBi B1H3 B1B2 H3H4 HBiH H3B1H4 Bi H3B2 

The vector potential for a linearly polarized laser pulse employed here is of a Gaussian form 

According to the usual convention, we define the electric field strength Eg 

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