155 citations · 1.1k across the 71 of their papers we have counts for
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Microscopic derivation of Frenkel excitons in second quantization
M. Combescot, W. V. Pogosov
Starting from the microscopic hamiltonian describing free electrons in a periodic lattice, we derive the hamiltonian appropriate to Frenkel excitons. This is done through a groupin…
Bose-Einstein condensation in semiconductors: the key role of dark excitons
Monique Combescot, Odile Betbeder-Matibet, Roland Combescot
The non elementary-boson nature of excitons controls Bose-Einstein condensation in semiconductors. Composite excitons interact predominantly through Pauli exclusion; this produces…
Polariton-polariton scattering: exact results through a novel approach
M. Combescot, M. -A. Dupertuis, O. Betbeder-Matibet
We present a fully microscopic approach to the transition rate of two exciton-photon polaritons. The non-trivial consequences of the polariton composite nature -- here treated exac…
Exciton-exciton scattering: Composite boson versus elementary boson
M. Combescot, O. Betbeder-Matibet, R. Combescot
This paper introduces a new quantum object, the ``coboson'', for composite particles, like the excitons, which are made of two fermions. Although commonly dealed with as elementary…
Shiva diagrams for composite-boson many-body effects : How they work
M. Combescot, O. Betbeder-Matibet
The purpose of this paper is to show how the diagrammatic expansion in fermion exchanges of scalar products of -composite-boson (``coboson'') states can be obtained in a practic…