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- W2159423786 abstract "Summary form only given. Large-radius excitons in semiconductors suffer strong Coulomb interaction on close approach. This is a distinctive difference in comparison with two-level systems in quantum optics. A mean field theory of interacting excitons in semiconductors leads to purely repulsive interaction, and does not account for spin-dependent polarization mixing and the formation of excitonic molecules (biexcitons). We have developed a theory for the nonlinear optical response, which can account for both. The coherent polarization is driven by exciton-exciton correlation, which can be expressed in terms of spin-dependent retarded memory functions. The effective equation is a generalized Gross-Pitaevskii equation." @default.
- W2159423786 created "2016-06-24" @default.
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- W2159423786 date "2000-05-12" @default.
- W2159423786 modified "2023-09-24" @default.
- W2159423786 title "Collective oscillations, excitonic molecules and dephasing of excitons at low density" @default.
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