Many-body effects in two-dimensional optical spectra of semiconductor quantum dot pairs; time-dependent Hartree–Fock approximation and beyond

We calculate coherent, third-order, nonlinear spectra of a pair of quantum dots by solving the nonlinear exciton equations, which include relevant single-exciton and two-exciton variables. The signals carry direct information on exciton dynamics and correlations. Spectra calculated with the time-dep...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2008-01, Vol.20 (4), p.045206-045206 (10), Article 045206
Main Authors: Oszwałdowski, R, Abramavicius, D, Mukamel, S
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Exact sciences and technology
Physics
Quantum dots
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Summary:We calculate coherent, third-order, nonlinear spectra of a pair of quantum dots by solving the nonlinear exciton equations, which include relevant single-exciton and two-exciton variables. The signals carry direct information on exciton dynamics and correlations. Spectra calculated with the time-dependent Hartree-Fock approximation, where the two-exciton variables are factorized, miss some important features, attributed to correlated electron-hole pairs.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/20/04/045206