Screening of magnetic fields by charged Bose condensate
Abstract
The space-space component of the photon polarization operator is calculated in zero frequency limit for a medium with Bose-Einstein condensate (BEC) of electrically charged particles. It is found that the polarization operator tends to a finite value at vanishing photon 3-momentum, as it happens in superconducting media. It means that magnetic fields are exponentially screened in such a medium analogously to the Debye screening of electric charges. At non-zero temperature the screened magnetic field oscillates and contains a contribution which drops only as a power of distance. This phenomenon is unknown for superconductors, even in BEC phase and can be potentially observable.
Keywords
Cite
@article{arxiv.1105.2308,
title = {Screening of magnetic fields by charged Bose condensate},
author = {Alexander D. Dolgov and Angela Lepidi},
journal= {arXiv preprint arXiv:1105.2308},
year = {2011}
}
Comments
References added, minor changes in text, results unchanged. Matches version published in PLA