Modified Einstein equations from the 1-loop effective action of the IKKT model

verfasst von

Kaushlendra Kumar, Harold C. Steinacker

Abstract

We derive the equations of motion that arise from the one-loop effective action for the geometry of 3+1 dimensional quantum branes in the IKKT matrix model. These equations are cast into the form of generalized Einstein equations, with extra contributions from dilaton and axionic fields, as well as a novel anharmonicity tensor C_µν capturing the classical Yang-Mills-type action. The resulting gravity theory approximately reduces to general relativity in some regime, but differs significantly at cosmic scales, leading to an asymptotically flat Friedmann-Lemaître-Robertson-Walker cosmological evolution governed by the classical action.

Organisationseinheit(en)

Institut für Theoretische Physik

Externe Organisation(en)

Universität Wien
Erwin Schrödinger Internationales Institut für mathematische Physik (ESI)

Typ

Artikel

Journal

Classical and quantum gravity

Band

41

Anzahl der Seiten

25

ISSN

0264-9381

Publikationsdatum

19.09.2024

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Physik und Astronomie (sonstige)

Elektronische Version(en)

https://doi.org/10.48550/arXiv.2312.01317 (Zugang: Offen)
https://doi.org/10.1088/1361-6382/ad6e4b (Zugang: Offen)