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Long-time dynamics and stationary nonequilibrium of an optically driven strongly confined quantum dot coupled to phonons

Titelangaben

Glässl, Martin ; Vagov, Alexei ; Lüker, Sebastian ; Reiter, Doris ; Croitoru, Mikhail D. ; Machnikowski, Paweł ; Axt, Vollrath Martin ; Kuhn, Tilmann:
Long-time dynamics and stationary nonequilibrium of an optically driven strongly confined quantum dot coupled to phonons.
In: Physical Review B. Bd. 84 (2011) Heft 19 . - 195311.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.84.195311

Angaben zu Projekten

Projektfinanzierung: Alexander von Humboldt-Stiftung
Studienstiftung des Deutschen Volkes, Foundation for Polish Science under the TEAM programme, co-financed by the European Regional Development Fund.

Abstract

We study the long-time dynamics and the stationary nonequilibrium state of an optically driven quantum dot coupled to acoustic phonons using numerically exact real-time path integrals and a fourth-order correlation expansion. By exploring wide ranges of temperatures, carrier-phonon and carrier-light coupling strengths, we characterize the stationary nonequilibrium state and compare the exact solution to known, approximatively derived results. It is found that analytical calculations tend to overestimate the influence of the carrier-phonon coupling, particularly at low temperatures and in the weak-coupling regime. The possibility of controlling the dot occupation in the stationary nonequilibrium by varying the laser detuning is discussed. A comparison between the numerical methods identifies the range of validity of the correlation expansion, which in the long-time limit is found to be surprisingly wide.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: quantum dot; path-integrals; non-linear optics; ultrafast dynamics; pure dephasing; phonons; decoherence; excitons; non-Markovian dynamics; memory effects; phonon-induced memory; multi-phonon processes; damping of Rabi oscillations; stationary non-equilibrium state; fourth-order correlation expansion
Institutionen der Universität: Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Theoretische Physik III > Lehrstuhl Theoretische Physik III - Univ.-Prof. Dr. Martin Axt
Fakultäten
Fakultäten > Fakultät für Mathematik, Physik und Informatik
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Theoretische Physik III
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Eingestellt am: 30 Okt 2017 14:14
Letzte Änderung: 03 Aug 2023 11:06
URI: https://eref.uni-bayreuth.de/id/eprint/40227