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Screening of the Coulomb Potential in the Athermal Stage in Highly Excited Semiconductors
Author(s) -
Heiner E.
Publication year - 1989
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/pssb.2221530131
Subject(s) - hamiltonian (control theory) , observable , resolvent , non equilibrium thermodynamics , coulomb , operator (biology) , physics , excited state , diagonal , quantum mechanics , limit (mathematics) , mathematical physics , quantum electrodynamics , mathematics , mathematical analysis , chemistry , electron , mathematical optimization , biochemistry , repressor , transcription factor , gene , geometry
Equations for the reduced density operator are evaluated. Investigating the subdynamics of nonrelevant observables a resolvent formulation is obtained selfconsistently for the screening part of the evolution superoperator. Utilizing the diagonal representation for the time‐dependent mean field term of the Hamiltonian, a selfconsistent concrete calculation of the screened potential is possible in the high density limit of the nonequilibrium. The result is an extension of the well known RPA‐formula for nonequilibrium two‐band systems of Fermions. An extension to the semimarkovian approximation is counted for.