Dephasing of orbital and spin degrees of freedom in semiconductor quantum dots due to phonons and magnons

6533b862fe1ef96bd12c75e5

RESEARCH PRODUCT

Dephasing of orbital and spin degrees of freedom in semiconductor quantum dots due to phonons and magnons

Lucjan Jacak Ryszard Gonczarek Janusz Jacak Witold Jacak J. Krasnyj

subject

Physics Quantum decoherence Condensed matter physics Condensed Matter::Other Phonon Exciton Magnon Dephasing Magnetic semiconductor Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Condensed Matter::Materials Science symbols.namesake Pauli exclusion principle Quantum dot symbols

description

Phonon-induced decoherence of orbital degrees of freedom in quantum dots (QDs) (GaAs/InAs) is studied and the relevant time-scales are estimated versus dot dimension. Dephasing of excitons due to acoustic phonons and optical phonons, including enhancement of the effective Frohlich constant caused by localization, is assessed for the state-of-art QDs. Temporal inefficiency of Pauli blocking in QDs due to lattice inertia is additionally predicted. For QD placed in a diluted magnetic semiconductor medium a magnon induced dephasing of spin is estimated in accordance with experimental results for Zn(Mn)Se/CdSe. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

year	journal	country	edition	language
2006-11-22	physica status solidi c

https://doi.org/10.1002/pssc.200671563

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