Berlin 2008 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 23: Quantum chaos I
DY 23.4: Vortrag
Donnerstag, 28. Februar 2008, 10:30–10:45, MA 001
Conservation of energy in coherent backscattering of light — •Susanne Fiebig1, Christof M. Aegerter1, Wolfgang Bührer1, Eric Akkermans2, Gilles Montambaux3, and Georg Maret1 — 1Universität Konstanz, Konstanz, Germany — 2Technion Israel Institute of Technology, Haifa, Israel — 3Universite Paris-Sud, Orsay, France
Although conservation of energy is fundamental in physics, its principles seem to be violated in the field of wave propagation in turbid media by the energy enhancement of the coherent backscattering cone. We present experimental data which show that the energy enhancement of the cone is balanced by an energy cutback at all scattering angles. Moreover, we give a theoretical description, which is in good agreement with these data. The additional terms needed to enforce energy conservation in this description result from an interference effect between incident and multiply scattered waves, which is reminiscent of the optical theorem in single scattering.