Anisotropic exchange interaction induced by a few photons in semiconductor microcavities

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We investigate coupling of localized spins in a semiconductor quantum dot embedded in a microcavity. The cavity mode and the quantum dot exciton are coupled forming a polariton, whereas excitons interact with localized spins via exchange. The Hamiltonian, which treats all degrees of freedom quantum...

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Autores principales: Chiappe, G., Louis, E., Anda, E.V.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03701972_v243_n15_p3885_Chiappe
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03701972_v243_n15_p3885_Chiappe
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spelling todo:paper_03701972_v243_n15_p3885_Chiappe2023-10-03T15:28:36Z Anisotropic exchange interaction induced by a few photons in semiconductor microcavities Chiappe, G. Louis, E. Anda, E.V. We investigate coupling of localized spins in a semiconductor quantum dot embedded in a microcavity. The cavity mode and the quantum dot exciton are coupled forming a polariton, whereas excitons interact with localized spins via exchange. The Hamiltonian, which treats all degrees of freedom quantum mechanically, is solved exactly. Main results, for up to three photons and cavities with a finite quality factor, are: a) at sufficiently low temperatures a finite anisotropic exchange interaction between spins is induced for small exciton occupation numbers, b) a finite quality factor induces an abrupt change to and fro between ferromagnetic and antiferromagnetic exchange interaction, and, c) the spin-spin correlation undergoes non-trivial changes upon increasing the number of photons from one to three. © 2006 WILEY-VCH Verlag GmbH & Co. KGaA. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03701972_v243_n15_p3885_Chiappe
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We investigate coupling of localized spins in a semiconductor quantum dot embedded in a microcavity. The cavity mode and the quantum dot exciton are coupled forming a polariton, whereas excitons interact with localized spins via exchange. The Hamiltonian, which treats all degrees of freedom quantum mechanically, is solved exactly. Main results, for up to three photons and cavities with a finite quality factor, are: a) at sufficiently low temperatures a finite anisotropic exchange interaction between spins is induced for small exciton occupation numbers, b) a finite quality factor induces an abrupt change to and fro between ferromagnetic and antiferromagnetic exchange interaction, and, c) the spin-spin correlation undergoes non-trivial changes upon increasing the number of photons from one to three. © 2006 WILEY-VCH Verlag GmbH & Co. KGaA.
format JOUR
author Chiappe, G.
Louis, E.
Anda, E.V.
spellingShingle Chiappe, G.
Louis, E.
Anda, E.V.
Anisotropic exchange interaction induced by a few photons in semiconductor microcavities
author_facet Chiappe, G.
Louis, E.
Anda, E.V.
author_sort Chiappe, G.
title Anisotropic exchange interaction induced by a few photons in semiconductor microcavities
title_short Anisotropic exchange interaction induced by a few photons in semiconductor microcavities
title_full Anisotropic exchange interaction induced by a few photons in semiconductor microcavities
title_fullStr Anisotropic exchange interaction induced by a few photons in semiconductor microcavities
title_full_unstemmed Anisotropic exchange interaction induced by a few photons in semiconductor microcavities
title_sort anisotropic exchange interaction induced by a few photons in semiconductor microcavities
url http://hdl.handle.net/20.500.12110/paper_03701972_v243_n15_p3885_Chiappe
work_keys_str_mv AT chiappeg anisotropicexchangeinteractioninducedbyafewphotonsinsemiconductormicrocavities
AT louise anisotropicexchangeinteractioninducedbyafewphotonsinsemiconductormicrocavities
AT andaev anisotropicexchangeinteractioninducedbyafewphotonsinsemiconductormicrocavities
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