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.
| Original language | English |
|---|---|
| Pages (from-to) | 394-403 |
| Number of pages | 10 |
| Journal | Annalen der Physik |
| Volume | 528 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 May 2016 |
Bibliographical note
Funding Information:We acknowledge discussion with C?t?lin Pa?cu Moca. This work was financially supported by the Research Fund of the University of Iceland, and the Icelandic Instruments Fund.We also acknowledge support from the computational facilities of the Nordic High Performance Computing NHPC, the Nordic network NANOCONTROL, project No.: P-13053, and the Ministry of Science and Technology, Taiwan through Contract No. MOST 103- 2112-M-239-001-MY3.
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© 2015 by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.