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Biexciton state preparation in a quantum dot via adiabatic rapid passage : Comparison between two control protocols and impact of phonon-induced dephasing

Title data

Glässl, Martin ; Barth, Andreas M. ; Gawarecki, Krzysztof ; Machnikowski, Paweł ; Croitoru, Mikhail D. ; Lüker, Sebastian ; Reiter, Doris ; Kuhn, Tilmann ; Axt, Vollrath M.:
Biexciton state preparation in a quantum dot via adiabatic rapid passage : Comparison between two control protocols and impact of phonon-induced dephasing.
In: Physical Review B. Vol. 87 (2013) Issue 8 . - Art.Nr. 085303, 8 S..
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.87.085303

Project information

Project financing: Alexander von Humboldt-Stiftung
Studienstiftung des deutschen Volkes

Abstract in another language

We investigate theoretically under what conditions a stable and high-fidelity preparation of the biexciton state in a quantum dot can be realized by means of adiabatic rapid passage in the presence of acoustic phonon coupling. Our analysis is based on a numerically complete real-time path-integral approach and comprises two different schemes of optical driving using frequency-swept (chirped) pulses. We show that depending on the size of the biexciton binding energy, resonant two-photon excitations or two-color schemes can be favorable. It is demonstrated that the carrier-phonon interaction strongly affects the efficiency of both protocols and that a robust preparation of the biexciton is restricted to positive chirps and low temperatures. A considerable increase of the biexciton yield can be achieved realizing temperatures below 4 K.

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; biexcitons; non-Markovian dynamics; memory effects; phonon-induced memory; multi-phonon processes; biexciton preparation; numerically complete real-time path integrals; quantum dissipative dynamics; phonon induced relaxation; chirped pulses
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 13:30
Last Modified: 02 Nov 2017 13:30
URI: https://eref.uni-bayreuth.de/id/eprint/40251