Effective dynamics of an electrically charged string with a current
Abstract
Equations of motion for an electrically charged string with a current in an external electromagnetic field with regard to the first correction due to the selfaction are derived. It is shown that the reparametrization invariance of the free action of the string imposes constraints on the possible form of the current. The effective equations of motion are obtained for an absolutely elastic charged string in the form of a ring (circle). Equations for the external electromagnetic fields that admit stationary states of such a ring are revealed. Solutions to the effective equations of motion of an absolutely elastic charged ring in the absence of external fields as well as in an external uniform magnetic field are obtained. In the latter case, the frequency at which one can observe radiation emitted by the ring is evaluated. A model of an absolutely nonstretchable charged string with a current is proposed. The effective equations of motion are derived within this model, and a class of solutions to these equations is found.
 Publication:

Soviet Journal of Experimental and Theoretical Physics
 Pub Date:
 August 2005
 DOI:
 10.1134/1.2047792
 arXiv:
 arXiv:hepth/0507237
 Bibcode:
 2005JETP..101..270K
 Keywords:

 High Energy Physics  Theory
 EPrint:
 14 pages, 3 figures, format changed, minor changes