Femtosecond Photodissociation of Molecules Facilitated by Noise

Details Femtosecond Photodissociation of Molecules Facilitated by Noise Femtosecond Photodissociation of Molecules Facilitated by Noise

2007-12-02

arxiv.org/abs/0712.0184v1

Physics

Quantum Physics

5 pages,5 figures

Scientific paper

10.1103/PhysRevA.77.022707

We investigate the dynamics of diatomic molecules subjected to both a femtosecond mid-infrared laser pulse and Gaussian white noise. The stochastic Schr\"odinger equation with a Morse potential is used to describe the molecular vibrations under noise and the laser pulse. For weak laser intensity, well below the dissociation threshold, it is shown that one can find an optimum amount of noise that leads to a dramatic enhancement of the dissociation probability. The enhancement landscape which is shown as a function of both the noise and the laser strength, exhibits a global maximum. A frequency-resolved gain profile is recorded with a pump-probe set-up which is experimentally realizable. With this profile we identify the linear and nonlinear multiphoton processes created by the interplay between laser and noise and assess their relative contribution to the dissociation enhancement.

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