Perturbations in dilaton-axion gravity coupled with electromagnetic fields

Details Perturbations in dilaton-axion gravity coupled with electromagnetic fields Perturbations in dilaton-axion gravity coupled with electromagnetic fields

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998phrvd..57.3433c&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 57, Issue 6, 15 March 1998, pp.3433-3442

Physics

4

Einstein-Maxwell Spacetimes, Spacetimes With Fluids, Radiation Or Classical Fields, Exact Solutions

Scientific paper

Explicit solutions of the perturbed Einstein-Maxwell-dilaton-axion theory are obtained by means of complex scalar potentials in the case when the background geometry is the spacetime corresponding to plane waves in the regions prior to the collision. These expressions are derived using Wald's method of adjoint operators and a decoupled system of equations; no gauge-fixing condition on the perturbed tetrad is imposed. Our results cover the low energy limit of string theory for some fixed values of the dilaton coupling constants. The existence of purely incoming perturbations is discussed.

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