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H 1 A brief introduction to Massive Gravity

Auteurs : Tolley, Andrew (Auteur de la Conférence)
CIRM (Editeur )

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    Résumé : Recent years have seen the development of a range of modified gravity theories to tackle the dark energy and cosmological constant problem. An interesting class of such models are those in which the graviton effectively becomes massive, modifying gravity at large (cosmological) distances without changing physics at solar system and smaller scales. Such effective field theories have the Vainshtein mechanism built in, and are closely associated with Galileon theories.

    In these lectures I will give a brief general overview of both soft and hard massive gravity theories, their origin from extra dimensional models, and the special class of ghost-free massive gravity models and their extensions with multiple massive (and massless) spin-2 states. I will review the Vainshtein mechanism, and the decoupling limits of these theories and how they are related to Galileons. I will then discuss a variety of implications of such theories.

    • lecture 1: I will introduce the description of massless and massive spin-2 states, and explain how theseemerge naturally in extra dimensional models, and go on to give the description of so-called ghost-freeor $\Lambda_{3}$ theories of interacting massive spin-2 fields, aka massive gravity and its multi-gravity extensions.

    • lecture 2: I will review some aspects of the phenomenology of the general class of massive gravity theories: screening - cosmology - black hole solutions, and if time go on to discuss more recent extensions which attempt to raise the cutoff, connections with UV completions such as TTbar deformations, and the significance of ‘positivity bounds’ applied to these effective theories.

    Codes MSC :
    83C47 - Methods of quantum field theory in general relativity
    83D05 - Relativistic gravitational theories other than Einstein's, including asymmetric field theories
    83E15 - Kaluza-Klein and other higher-dimensional theories
    83F05 - Relativistic cosmology
    85A40 - Cosmology

    Ressources complémentaires :

      Informations sur la Vidéo

      Réalisateur : Hennenfent, Guillaume
      Langue : Anglais
      Date de publication : 30/04/2021
      Date de captation : 12/04/2021
      Sous collection : Research talks
      Format : MP4
      arXiv category : High Energy Physics ; Astrophysics ; General Relativity and Quantum Cosmology
      Domaine : Mathematical Physics
      Durée : 01:19:35
      Audience : Chercheurs ; Doctorants , Post - Doctorants
      Download : https://videos.cirm-math.fr/2021-04-12_Tolley.mp4

    Informations sur la Rencontre Virtuelle

    Nom de la rencontre : Theory of Gravitation and Variation in Cosmology / Théorie de la gravitation et variations en cosmologie
    Organisateurs de la rencontre : Brax, Philippe ; de la Torre, Sylvain ; Masson, Thierry ; Triay, Roland
    Dates : 12/04/2021 - 16/04/2021
    Année de la rencontre : 2021
    URL Congrès : https://conferences.cirm-math.fr/2651.html

    Citation Data

    DOI : 10.24350/CIRM.V.19745603
    Cite this video as: Tolley, Andrew (2021). A brief introduction to Massive Gravity.CIRM . Audiovisual resource. doi:10.24350/CIRM.V.19745603
    URI : http://dx.doi.org/10.24350/CIRM.V.19745603

    Voir aussi


    1. DE RHAM, Claudia. Massive gravity. Living reviews in relativity, 2014, vol. 17, no 1, p. 1-189. - https://doi.org/10.12942/lrr-2014-7