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Cavity‐photon contribution to the effective interaction of electrons in parallel quantum dots |
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| Authors: | Vidar Gudmundsson Anna Sitek Nzar Rauf Abdullah Chi‐Shung Tang Andrei Manolescu |
| Institution: | 1. Science Institute, University of Iceland, Iceland;2. Department of Theoretical Physics, Faculty of Fundamental Problems of Technology, Wroc?aw University of Technology, Poland;3. Physics Department, Faculty of Science and Science Education, School of Science, University of Sulaimani, Kurdistan Region, Iraq;4. Department of Mechanical Engineering, National United University, Miaoli 36003, Taiwan;5. School of Science and Engineering, Reykjavik University, Iceland |
| 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. |
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