Monday, October 1, 2012

1209.6625 (Stephan Hoyer et al.)

Inverting pump-probe spectroscopy for state tomography of excitonic
systems
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Stephan Hoyer, K. Birgitta Whaley
We propose a two-step protocol for inverting ultrafast nonlinear spectroscopy experiments on a molecular aggregate to determine the excited state density matrix at times following laser excitation. The first step is a deconvolution of the experimental signal to determine a pump-dependent response function. The second step inverts the quantum state of the system from this response function, given a model for how the system evolves following the probe interaction. We demonstrate this inversion analytically and numerically for a dimer model system, and evaluate the feasibility of scaling it to larger molecular aggregates such as photosynthetic protein-pigment complexes.
View original: http://arxiv.org/abs/1209.6625

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