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SUMMARY:Exact Wormholes and Ernst-like Potentials in Einstein–Maxwell–
 Scalar Field Gravity
DTSTART:20260917T120000Z
DTEND:20260917T130000Z
DTSTAMP:20260809T045700Z
UID:indico-event-16920@indico.math.cnrs.fr
DESCRIPTION:Speakers: Leonel Bixano (Centro de Investigación y de Estudio
 s Avanzados\, Mexico)\n\nIn this talk\, I will present an Ernst-like formu
 lation for stationary axisymmetric solutions in Einstein-Maxwell-Scalar Fi
 eld gravity. The main idea is to encode the gravitational\, electromagneti
 c\, and scalar degrees of freedom into a set of potentials\, extending the
  standard Ernst formalism beyond the vacuum and Einstein-Maxwell sectors. 
 I will first explain how this framework reproduces several known exact sol
 utions\, including Schwarzschild\, Reissner-Nordström\, Gibbons-Maeda\, K
 err\, and Kerr-Newman\, showing how the metric functions and electromagnet
 ic fields can be reconstructed from the potential-space variables.\n \nAf
 ter introducing the formalism\, I will apply it to the construction of exa
 ct wormhole solutions. In particular\, I will discuss a stationary axisymm
 etric wormhole branch supported by scalar-electromagnetic fields in Einste
 in-Maxwell-Dilaton gravity. The solution will be described through the com
 plete set of functions (f\,\\omega\,k\,A_t\,A_\\varphi\,\\phi)\, and I wil
 l analyze its main geometric features\, including the throat structure\, t
 he existence of two asymptotic regions\, and the role of the ring singular
 ity in the global spacetime. The goal is to show that these wormholes are 
 not isolated examples\, but arise naturally within a broader Ernst-like po
 tential-space approach.\n\nhttps://indico.math.cnrs.fr/event/16920/
LOCATION:Salle 1180\, bâtiment E2 (Salle des séminaires )
URL:https://indico.math.cnrs.fr/event/16920/
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