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Cavity-photon contribution to the effective interaction of electrons in parallel quantum dots.

Cavity-photon contribution to the effective interaction of electrons in parallel quantum dots.

Authors :
Gudmundsson, Vidar
Sitek, Anna
Abdullah, Nzar Rauf
Tang, Chi‐Shung
Manolescu, Andrei
Source :
Annalen der Physik; May2016, Vol. 528 Issue 5, p394-403, 10p
Publication Year :
2016

Abstract

A single cavity photon mode is expected to modify the Coulomb interaction of an electron system in the cavity. Here we investigate this phenomena in a parallel double quantum dot system. We explore properties of the closed system and the system after it has been opened up for electron transport. We show how results for both cases support the idea that the effective electron-electron interaction becomes more repulsive in the presence of a cavity photon field. This can be understood in terms of the cavity photons dressing the polarization terms in the effective mutual electron interaction leading to nontrivial delocalization or polarization of the charge in the double parallel dot potential. In addition, we find that the effective repulsion of the electrons can be reduced by quadrupolar collective oscillations excited by an external classical dipole electric field. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00033804
Volume :
528
Issue :
5
Database :
Complementary Index
Journal :
Annalen der Physik
Publication Type :
Academic Journal
Accession number :
115099253
Full Text :
https://doi.org/10.1002/andp.201500298