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Electron-phonon quantum kinetics beyond the second-order Born approximation

Title data

Lohmeyer, Henning ; Axt, Vollrath M. ; Kuhn, Tilmann:
Electron-phonon quantum kinetics beyond the second-order Born approximation.
In: Menéndez, José ; van de Walle, Chris G. (ed.): Physics of Semiconductors : 27th International Conference on the Physics of Semiconductors (ICPS-27), Flagstaff, Arizona, 26 -30 July 2004. Vol. 2. - Melville, New York : American Institute of Physics (AIP) , 2005 . - pp. 907-908 . - (AIP Conference Proceedings ; 772 )
ISBN 0-7354-0257-4
DOI: https://doi.org/10.1063/1.1994401

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

For a one‐band model of a quantum wire coupled to LO‐phonons we present results for the dynamics of the coupled electron‐phonon system calculated with quantum kinetic equations obtained in the density matrix approach. Using a correlation expansion for the truncation of the infinite hierarchy of equations of motion we go beyond the usual second‐order Born approximation by taking into account two‐particle correlations and twofold phonon‐assisted density matrices. The different approximation levels are compared among each other and with an exact solution for a simplified case.

Further data

Item Type: Article in a book
Refereed: Yes
Keywords: higher order electron-phonon correlations; correlation expansion; LO phonons; quantum kinetics; fourth-order Born approximation
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: 24 Oct 2017 09:35
Last Modified: 24 Oct 2017 09:35
URI: https://eref.uni-bayreuth.de/id/eprint/40152