Abstract
The dynamics of the Maxwell-dilaton theory in Minkowski spacetime are studied using fully nonlinear, numerical evolutions. This model represents the flat-space sector of the Einstein-Maxwell-dilaton theory which has attracted interest recently because it is a well-posed alternative to general relativity, and it also represents the Abelian sector of the Yang-Mills-dilaton. As such, understanding its dynamics may shed light on the dynamics of the respective larger systems. In particular, we study electric, magnetic, and dyonic monopoles as well as the flux tubes studied previously by Gibbons and Wells. Some scenarios produce large gradients that an increasing adaptive mesh refinement fails to resolve. This behavior is suggestive, although far from conclusive, that the growth leads to singularity formation. No sharp transition between singularity formation and either dispersion or stationarity is found, unlike other nonlinear systems that have demonstrated a behavior similar to the black hole critical behavior at such transitions.
- Received 26 July 2019
DOI:https://doi.org/10.1103/PhysRevD.100.104040
© 2019 American Physical Society