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Coulomb quantum kinetics beyond RPA and Born approximation

Title data

Wolterink, T. ; Axt, Vollrath M. ; Kuhn, Tilmann:
Coulomb quantum kinetics beyond RPA and Born approximation.
In: Physica B. Vol. 314 (2002) Issue 1-4 . - 132 - 135.
ISSN 0921-4526
DOI: https://doi.org/10.1016/S0921-4526(01)01373-4

Project information

Project financing: Deutsche Forschungsgemeinschaft
European Commission TMR network Ultrafast Quantum Optoelectronics

Abstract in another language

The relaxation of a two-dimensional electron gas due to Coulomb scattering is analyzed theoretically within the density matrix formulation. By comparing results for quantum kinetic scattering in different approximations (e.g., Born approximation, random phase approximation, T-matrix approximation), we find substantial changes in the relaxation process due to different contributions. The influence of exchange contributions is discussed. By comparing different scattering models we can clearly identify the build-up of screening.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: build-up of screening; quantum wells; electronic screening; dynamical screening; correlations; microscopic theory; semiconductors; ultrafast dynamics; random phase approximation (RPA); Coulomb quantum kinetics; two-particle density matrix; exchange
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 18 Oct 2017 07:42
Last Modified: 18 Oct 2017 07:42
URI: https://eref.uni-bayreuth.de/id/eprint/40064