ENTRETIEN HIVERNOVERNAL DU VIRUS MYXOMATEUX DANS LES TERRIERS. Myxomatose d'inoculation par la puce du lapin et myxomatose de fouissement

Joubert L., Chippaux A., Mouchet Jean, Oudar Jean. Entretien hivernovernal du virus myxomateux dans les terriers. In: Bulletin de l'Académie Vétérinaire de France tome 122 n°2, 1969. pp. 93-101

Transmission de la myxomatose par les moustiques en Camargue. Rôle prééminent de Aedes caspius et des Anopheles du groupe maculipennis

Joubert L., Oudar Jean, Mouchet Jean, Hannoun Claude. Transmission de la myxomatose par les moustiques de Camargue. Rôle prééminent de Aedes caspius et des Anopheles du groupe maculipennis (Note présentée par M. Goret) . In: Bulletin de l'Académie Vétérinaire de France tome 120 n°7, 1967. pp. 315-322

The Role of Nonequilibrium Dynamical Screening in Carrier Thermalization

We investigate the role played by nonequilibrium dynamical screening in the thermalization of carriers in a simplified two-component two-band model of a semiconductor. The main feature of our approach is the theoretically sound treatment of collisions. We abandon Fermi's Golden rule in favor of a nonequilibrium field theoretic formalism as the former is applicable only in the long-time regime. We also introduce the concept of nonequilibrium dynamical screening. The dephasing of excitonic quantum beats as a result of carrier-carrier scattering is brought out. At low densities it is found that the dephasing times due to carrier-carrier scattering is in picoseconds and not femtoseconds, in agreement with experiments. The polarization dephasing rates are computed as a function of the excited carrier density and it is found that the dephasing rate for carrier-carrier scattering is proportional to the carrier density at ultralow densities. The scaling relation is sublinear at higher densities, which enables a comparison with experiment.Comment: Revised version with additional refs. 12 pages, figs. available upon request; Submitted to Phys. Rev.