Abstract
These are the notes for a course on a theoretical description of condensation of excitons and exciton-polaritons in semiconductors. A special emphasis is made on the case of quantum wells. We start by presenting a standard theory that can be found also in several excellent books and reviews. We concentrate in the question of detecting condensation without paying attention to the open problem of the dynamics of condensation appearance. Special care is devoted to the emission of light. The recently studied case of condensation of magnetoexcitons is briefly discussed. Since excitons have the third component of the total angular momentum as an internal degree of freedom, this opens the extremely interesting possibility of multicomponent condensates which we discuss in some detail. In particular, we show the appearance of an interesting behavior of the polarization of the light emitted by this multicomponent condensate.
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Porras, D., Fernandez-Rossier, J., Tejedor, C. Exciton and Polariton Condensation. In: Pötz, W., Hohenester, U., Fabian, J. (eds) Quantum Coherence. Lecture Notes in Physics, vol 689. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11398448_5
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