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Dephasing in the adiabatic rapid passage in quantum dots : Role of phonon-assisted biexciton generation

Title data

Gawarecki, Krzysztof ; Lüker, Sebastian ; Reiter, Doris ; Kuhn, Tilmann ; Glässl, Martin ; Axt, Vollrath M. ; Grodecka-Grad, Anna ; Machnikowski, Paweł:
Dephasing in the adiabatic rapid passage in quantum dots : Role of phonon-assisted biexciton generation.
In: Physical Review B. Vol. 86 (2012) Issue 23 . - Art.Nr. 235301, 6 S..
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.86.235301

Project information

Project financing: Alexander von Humboldt-Stiftung
Deutscher Akademischer Austauschdienst
Supported by the TEAM programme of the Foundation for Polish Science, co-financed by the European Regional Development Fund

Abstract in another language

We study the evolution of an exciton confined in a quantum dot adiabatically controlled by a frequency-swept (chirped) laser pulse in the presence of carrier-phonon coupling. We focus on the dynamics induced by a linearly polarized beam and analyze the decoherence due to phonon-assisted biexciton generation. We show that if the biexciton state is shifted down by a few meV, as is typically the case, then the resulting decoherence is strong even at low temperatures. As a result, efficient state preparation is restricted to a small parameter area corresponding to low temperatures, positive chirps, and moderate pulse areas.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dots; biexciton; phonons; time-convolutionless (TCL) evolution equation; decoherence; exciton preparation; phonon-assisted biexciton generation; adiabatic rapid passage
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: 02 Nov 2017 10:27
Last Modified: 02 Nov 2017 10:27
URI: https://eref.uni-bayreuth.de/id/eprint/40242