Archive: 2008 - Moldavian Journal of the Physical Sciences

05 Jul 2008

2008
V. 7
3
(p.334 - 342)

Revival of rabi oscillations in optically excited semiconductor quantum dots

Authors:

Croitor, Mihail

Summary:

We present the theoretical investigation of the dynamics of strongly confined laser driven semiconductor quantum dots coupled to phonons. We provide a formally exact solution of this non-Markovian quantum decoherence problem. The method is based on the discrete time-dependent path-integral Monte Carlo technique. This method allows us to explore the cases of long pulses, arbitrary dot-phonon and dot-laser coupling and high temperatures, which up to now have been inaccessible. We find that although Rabi oscillations of the density matrix are suppressed due to phonon induced dephasing, the dephasing rate is a non-monotonic function of the laser field and that it becomes smaller at larger fields leading to a remarkable revival of the Rabi oscillations. This revival is of a general nature which for the type of systems studied here occurs for all temperatures and carrier-phonon coupling strengths.

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 time-dependent path-integral Monte Carlo technique. This method allows us to explore the
 cases of long pulses, arbitrary dot-phonon and dot-laser coupling and high temperatures, which
 up to now have been inaccessible. We find that although Rabi oscillations of the density matrix
 are suppressed due to phonon induced dephasing, the dephasing rate is a non-monotonic function of the laser field and that it becomes smaller at larger fields leading to a remarkable revival of the Rabi oscillations. This revival is of a general nature which for the type of systems
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BibTeX

@article{ibn_3914,
author = {Croitor, M.},
title = {Revival of rabi oscillations in optically excited semiconductor quantum dots},
journal = {Moldavian Journal of the Physical Sciences},
year = {2008},
volume = {7 (3)},
pages = {334-342},
month = {Jul},
abstract = {(EN) We present the theoretical investigation of the dynamics of strongly confined laser

driven semiconductor quantum dots coupled to phonons. We provide a formally exact solution
 of this non-Markovian quantum decoherence problem. The method is based on the discrete
 time-dependent path-integral Monte Carlo technique. This method allows us to explore the
 cases of long pulses, arbitrary dot-phonon and dot-laser coupling and high temperatures, which
 up to now have been inaccessible. We find that although Rabi oscillations of the density matrix
 are suppressed due to phonon induced dephasing, the dephasing rate is a non-monotonic function of the laser field and that it becomes smaller at larger fields leading to a remarkable revival of the Rabi oscillations. This revival is of a general nature which for the type of systems
 studied here occurs for all temperatures and carrier-phonon coupling strengths.},
url = {https://ibn.idsi.md/vizualizare_articol/3914},
}

DataCite

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 of this non-Markovian quantum decoherence problem. The method is based on the discrete
 time-dependent path-integral Monte Carlo technique. This method allows us to explore the
 cases of long pulses, arbitrary dot-phonon and dot-laser coupling and high temperatures, which
 up to now have been inaccessible. We find that although Rabi oscillations of the density matrix
 are suppressed due to phonon induced dephasing, the dephasing rate is a non-monotonic function of the laser field and that it becomes smaller at larger fields leading to a remarkable revival of the Rabi oscillations. This revival is of a general nature which for the type of systems
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Dublin Core

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<dc:description xml:lang='en'>We present the theoretical investigation of the dynamics of strongly confined laser

driven semiconductor quantum dots coupled to phonons. We provide a formally exact solution
 of this non-Markovian quantum decoherence problem. The method is based on the discrete
 time-dependent path-integral Monte Carlo technique. This method allows us to explore the
 cases of long pulses, arbitrary dot-phonon and dot-laser coupling and high temperatures, which
 up to now have been inaccessible. We find that although Rabi oscillations of the density matrix
 are suppressed due to phonon induced dephasing, the dephasing rate is a non-monotonic function of the laser field and that it becomes smaller at larger fields leading to a remarkable revival of the Rabi oscillations. This revival is of a general nature which for the type of systems
 studied here occurs for all temperatures and carrier-phonon coupling strengths.</dc:description>
<dc:source>Moldavian Journal of the Physical Sciences 7 (3) 334-342</dc:source>
<dc:title>Revival of rabi oscillations in optically excited semiconductor quantum dots</dc:title>
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