Persistent current induced by vacuum fluctuations in a quantum ring
Mesoscale and Nanoscale Physics
2013-07-02 v2
Abstract
We study theoretically interaction between electrons in a quantum ring embedded in a microcavity and vacuum fluctuations of electromagnetic field in the cavity. It is shown that the vacuum fluctuations can split electron states of the ring with opposite angular momenta. As a consequence, the ground state of electron system in the quantum ring can be associated to nonzero electric current. Since a ground-state current flows without dissipation, such a quantum ring gets a magnetic moment and can be treated as an artificial spin.
Cite
@article{arxiv.1305.1553,
title = {Persistent current induced by vacuum fluctuations in a quantum ring},
author = {O. V. Kibis and O. Kyriienko and I. A. Shelykh},
journal= {arXiv preprint arXiv:1305.1553},
year = {2013}
}
Comments
7 pages, 2 figures; published version