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Kinetics of the Dephasing and the Condensation of Excitons
Author(s) -
Schmitt O.M.,
Gartner P.,
Bányai L.,
Tran Thoai D.B.,
Haug H.
Publication year - 2000
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200009)221:1<221::aid-pssb221>3.0.co;2-h
Subject(s) - dephasing , exciton , excitation , scattering , condensed matter physics , phonon , physics , bose–einstein condensate , condensation , kinetics , biexciton , atomic physics , quantum mechanics , thermodynamics
The dephasing and condensation kinetics of bosonic excitons after coherent pulse excitation is studied in the vicinity of a Bose‐Einstein condensation (BEC). For a system of excitons interacting with acoustic phonons various excitation conditions are investigated. Significant qualitative changes of the polarization dephasing in the vicinity of the BEC are discussed. Furthermore the kinetics of excitons, interacting via a two particle interaction, is studied. Both the bosonic mean‐field terms and the scattering terms are calculated on a microscopic level. As in the phonon‐model the dephasing rate of the exciton–exciton scattering diminishes considerably in the vicinity of the BEC. All results are suited as experimentally observable signatures of an excitonic BEC.