Control of molecular dynamics with zero-area fields: Application to   molecular orientation and photofragmentation
  The constraint of time-integrated zero-area on the laser field is a fundamental, both theoretical and experimental requirement in the control of molecular dynamics. By using techniques of local and optimal control theory, we show how to enforce this constraint on two benchmark control problems, namely molecular orientation and photofragmentation. The origin and the physical implications on the dynamics of this zero-area control field are discussed. 
D. Sugny, St\'ephane Vranckx, Mamadou Ndong, Nathalie Vaeck, Osman   Atabek, Mich\`ele Desouter-Lecomte
quant-ph