Theoretical investigation of the nonlinear circular dichroism in a liquid of chiral molecules

Introducing nonlocal effects such as magnetic dipolar and electric quadrupo lar ones in the time-dependent perturbation theory, we show that a liquid o f chiral molecules should exhibit a nonlinear circular dichroism, i.e., a d ifference in the nonlinear absorption depending on the handedness of the li ght polarization. General expressions are given, and it is shown that such an effect should be measurable experimentally.