Titel
Gravity as a quantum effect on quantum space-time
Autor*in
Abstract
The 3+1-dimensional Einstein-Hilbert action is obtained from the 1-loop effective action on noncommutative branes in the IIB or IKKT matrix model. The presence of compact fuzzy extra dimensions K as well as maximal supersymmetry of the model is essential. The E-H action can be interpreted as interaction of K with the space-time brane via IIB supergravity, and the effective Newton constant is determined by the Kaluza-Klein scale of K. The classical matrix model defines a pre-gravity action with 2 derivatives less than the induced E-H action, governing the cosmological regime. The perturbative physics is confined to the space-time brane, which for covariant quantum space-times includes all dof of gravity, as well as a tower of higher-spin modes. The vacuum energy of the background is given in terms of the symplectic volume form, and hence does not act as cosmological constant.
Stichwort
Nuclear and High Energy Physics
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
phaidra.univie.ac.at/o:1656923
Erschienen in
Titel
Physics Letters B
Band
827
ISSN
0370-2693
Erscheinungsdatum
2022
Publication
Elsevier BV
Fördergeber
Erscheinungsdatum
2022
Zugänglichkeit
Rechte
Rechteangabe
© 2022 The Author(s)
Universität Wien | Universitätsring 1 | 1010 Wien | T
+43-1-4277-0