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

Title data

Glässl, Martin ; Vagov, Alexei ; Lüker, Sebastian ; Reiter, Doris ; Croitoru, Mikhail D. ; Machnikowski, Paweł ; Axt, Vollrath M. ; Kuhn, Tilmann:
Long-time dynamics and stationary nonequilibrium of an optically driven strongly confined quantum dot coupled to phonons.
In: Physical Review B. Vol. 84 (2011) Issue 19 . - Art.Nr. 195311, 8 S..
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.84.195311

Project information

Project financing: 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 in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
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
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: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 30 Oct 2017 14:14
Last Modified: 09 Aug 2018 07:29
URI: https://eref.uni-bayreuth.de/id/eprint/40227