Electricmagnetic duality in string theory
Abstract
The electricmagnetic duality transformation in fourdimensional heterotic string theory discussed by Shapere, Trivedi and Wilczek is shown to be an exact symmetry of the equations of motion of lowenergy effective field theory even after including the scalar and the vector fields, arising due to compactification, in the effective field theory. Using this duality transformation we construct rotating black hole solutions in the effective field theory carrying both electric and magnetic charges. The spectrum of extremal magnetically charged black holes turns out to be similar to that of electrically charged elementary string excitations. We also discuss the possibility that the duality symmetry is an exact symmetry of the full string theory under which electrically charged elementary string excitations get exchanged with magnetically charged solitonlike solutions. This proposal might be made concrete following the suggestion of Dabholkar et al. that fundamental strings may be regarded as solitonlike classical solutions in the effective field theory.
 Publication:

Nuclear Physics B
 Pub Date:
 August 1993
 DOI:
 10.1016/05503213(93)904755
 arXiv:
 arXiv:hepth/9207053
 Bibcode:
 1993NuPhB.404..109S
 Keywords:

 High Energy Physics  Theory
 EPrint:
 20 pages, phyzzx.tex, TIFRTH9241 (The section on dyonic black holes has been modified and expanded, minor corrections have been made in the other sections)