Time-dependent density-matrix functional theory for biexcitonic phenomena

Details Time-dependent density-matrix functional theory for biexcitonic phenomena Time-dependent density-matrix functional theory for biexcitonic phenomena

2010-08-09

arxiv.org/abs/1008.1532v1

Physics

Condensed Matter

Materials Science

Scientific paper

We formulate a time-dependent density-matrix functional theory (TDDMFT) approach for higher-order correlation effects like biexcitons in optical processes in solids based on the reduced two-particle density-matrix formalism within the normal orbital representation. A TDDMFT version of the Schr\"odinger equation for biexcitons in terms of one- and two-body reduced density matrices is derived, which leads to finite biexcitonic binding energies already with an adiabatic approximation. Biexcitonic binding energies for several bulk semiconductors are calculated using a contact biexciton model.

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