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Vanadium sesquioxide, V2O3, boasts a rich phase diagram whose descriptionnecessitates the accounting for many-body Coulomb correlations. Spectralproperties of this compound have been successfully addressed within dynamicalmean field theory to an extent that results of recent angle resolvedphotoemission experiments have been correctly predicted. While photoemissionspectroscopy probes the occupied part of the one-particle spectrum, opticalexperiments measure transitions into empty states and thus providecomplementary information. In this work, we focus on the optical properties ofV2O3 in its paramagnetic phases by employing our recently developed"generalized Peierls approach". Compared to experiments, we obtain results inoverall satisfactory agreement. Further, we rationalize that the experimentallyobserved temperature dependence stems from the different coherence scales ofthe involved charge carriers.

Multi-orbital Effects in Optical Properties of Vanadium Sesquioxide