155 citations · 1.1k across the 71 of their papers we have counts for
9 papers · 1 filter
Ground state energy of N Frenkel excitons
W. V. Pogosov, M. Combescot
By using the composite many-body theory for Frenkel excitons we have recently developed, we here derive the ground state energy of Frenkel excitons in the Born approximation th…
Third order susceptibility: general formalism for photoinduced current density in semiconductors
M. Combescot, O. Betbeder-Matibet
This paper contains a detailed derivation of the photoinduced current density at third order in the coupling between a semiconductor and a multifrequency photon field, starting fro…
Stability of a Bose-Einstein condensate revisited for composite bosons
M. Combescot, D. W. Snoke
It is known that elementary bosons condense in a unique state, not so much because this state has the lowest free particle energy but because it costs a macroscopic amount of energ…
On the dark nature of exciton Bose-Einstein condensate
Monique Combescot, Michael N. Leuenberger
We show that for the very same reason that excitons are bright, i.e. coupled to photons, they have a higher energy than dark excitons, even for electrons spatially separated from h…
Exciton many-body effects through infinite series of composite-exciton operators
M. Combescot, O. Betbeder-Matibet
We revisit the approach proposed by Mukamel and coworkers to describe interacting excitons through infinite series of composite-boson operators for both, the system Hamiltonian and…
Effect of fermionic components on trion-electron scattering
M. Combescot, O. Betbeder-Matibet, M. A. Dupertuis
To test the validity of replacing a composite fermion by an elementary fermion, we here calculate the transition rate from a state made of one free electron and one trion to a simi…
Closure relations for composite bosons: difference between polaritons and Wannier or Frenkel excitons
M. Combescot, M. A. Dupertuis
We derive the closure relation for polaritons made of three different types of excitons: bosonized excitons, Frenkel or Wannier excitons. In the case of polaritons made of Wann…
A predicted "Faraday oscillation" in photoexcited semiconductors
M. Combescot, O. Betbeder-Matibet
While, for semiconductors photoexcited by a circularly polarized pump, the polarization plane of a linearly polarized probe has been shown to rotate, we here predict a spectacular…
Composite boson many-body theory for Frenkel excitons
M. Combescot, W. V. Pogosov
We present a many-body theory for Frenkel excitons which takes into account their composite nature exactly. Our approach is based on four commutators similar to the ones we previou…