Signatures of molecular correlations in few-electron dynamics of coupled quantum dots

Bertoni  A; Climente  JI; Rontani  MGoldoni  GHohenester  U

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Signatures of molecular correlations in few-electron dynamics of coupled quantum dots

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摘要

We study the effect of Coulomb interaction on the few-electron dynamics in coupled semiconductor quantum dots by exact diagonalization of the few-body Hamiltonian. The oscillation of carriers is strongly affected by the number of confined electrons and by the strength of the interdot correlations. Single-frequency oscillations are found for either uncorrelated or highly correlated states, while multifrequency oscillations take place in the intermediate regime. Moreover, Coulomb interaction renders few-particle oscillations sensitive to perturbations in spatial directions other than that of the tunneling, contrary to the single-particle case. The inclusion of acoustic phonon scattering does not modify the carrier dynamics substantially at short times, but it can damp oscillation modes selectively at long times.

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《Physical review, B. Condensed matter and materials physics》 |2007年第23期|233303-1-233303-4-0|共4页
作者
Bertoni A; Climente JI; Rontani MGoldoni GHohenester U;
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作者单位

Natl Res Ctr Nanostruct & Biosyst Surfaces S3, INFM, CNR, I-41100 Modena, Italy;

Univ Modena, Dipartimento Fis, I-41100 Modena, Italy;

Karl Franzens Univ Graz, Inst Phys, A-8010 Graz, Austria;

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原文格式 PDF
正文语种英语
中图分类固体物理学;
关键词
COULOMB INTERACTION; CHARGE QUBIT; OSCILLATIONS;

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Signatures of molecular correlations in few-electron dynamics of coupled quantum dots

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