Statut  Confirmé 
Série  RENCTHEO 
Domaines  hepth 
Date  Jeudi 14 Mars 2019 
Heure  10:00 
Institut  IHP 
Salle  314 
Nom de l'orateur  Hartong 
Prenom de l'orateur  Jelle 
Addresse email de l'orateur  
Institution de l'orateur  Edinburgh U. 
Titre  Nonrelativistic Gravity 
Résumé  In this talk I will discuss the expansion of general relativity in inverse powers of the speed of light. This expansion can be truncated at any desired order and, when truncated at the next toleading order, it can be used to derive an action principle for a diffeomorphism invariant description of nonrelativistic gravity. This describes Newtonian gravity as well as strong gravity extensions thereof (e.g. due to time dilation effects). I will show how to couple such a theory to matter (point particles, scalar fields and fluids) and use this to show that the TolmanOppenheimerVolkov star solution and the Friedmann equations can both be viewed as solutions to the equations of motion of matter coupled nonrelativistic gravity. By looking at geodesics in a spherically symmetric background one can show that the phenomenon of perihelion precession is also described by this theory. Time permitting I will end with some comments about string and holographic extensions of these results. 
Numéro de preprint arXiv  
Commentaires  
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