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Fast and selective phonon-assisted state preparation of a quantum dot by adiabatic undressing

Title data

Barth, Andreas M. ; Lüker, Sebastian ; Vagov, Alexei ; Reiter, Doris ; Kuhn, Tilmann ; Axt, Vollrath M.:
Fast and selective phonon-assisted state preparation of a quantum dot by adiabatic undressing.
In: Physical Review B. Vol. 94 (2016) Issue 4 . - Art.Nr. 045306, 10 S..
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.94.045306

Project information

Project financing: Deutscher Akademischer Austauschdienst
Deutsche Forschungsgemeinschaft

Abstract in another language

We investigate theoretically the temporal behavior of a quantum dot under off-resonant optical excitation targeted at fast acoustic phonon-assisted state preparation. We demonstrate that in a preparation process driven by short laser pulses, three processes can be identified: a dressing of the states during the switch-on of the laser pulse, a subsequent phonon-induced relaxation, and an undressing at the end of the pulse. By analyzing excitation scenarios with different pulse shapes we highlight the decisive impact of an adiabatic undressing on the final state in short-pulse protocols. Furthermore, we show that in exciton-biexciton systems the laser characteristics such as the pulse detuning and the pulse length as well as the biexciton binding energy can be used to select the targeted quantum dot state.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dot; path-integrals; nonlinear optics; ultrafast dynamics; pure dephasing; phonons; decoherence; excitons; biexcitons; non-Markovian dynamics; memory effects; phonon-induced memory; multi-phonon processes; exciton preparation; biexciton preparation; phonon-assisted off-resonant preparation; fast robust on-demand preparation; high fidelity; dressed states; adiabatic undressing; numerically complete real-time path integrals; quantum dissipative dynamics
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: 03 Nov 2017 11:09
Last Modified: 03 Nov 2017 11:09
URI: https://eref.uni-bayreuth.de/id/eprint/40288