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Probing quantum-mechanical level repulsion in disordered systems by means of time-resolved selectively-excited resonance fluorescence

A. V. Malyshev·V. A. Malyshev·J. Knoester
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Abstract

We argue that the time-resolved spectrum of selectively-excited resonance fluorescence at low temperature provides a tool for probing the quantum-mechanical level repulsion in the Lifshits tail of the electronic density of states in a wide variety of disordered materials. The technique, based on detecting the fast growth of a fluorescence peak that is red-shifted relative to the excitation frequency, is demonstrated explicitly by simulations on linear Frenkel exciton chains.

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A. V. Malyshev, V. A. Malyshev, J. Knoester. 2007-01-17. Probing quantum-mechanical level repulsion in disordered systems by means of time-resolved selectively-excited resonance fluorescence. https://doi.org/10.1103/physrevlett.98.087401

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