Emergent gravity from noncommutative gauge theory


Steinacker, H. (2008). Emergent gravity from noncommutative gauge theory. Perimeter Institute. https://pirsa.org/08010002


Steinacker, Harold. Emergent gravity from noncommutative gauge theory. Perimeter Institute, Jan. 24, 2008, https://pirsa.org/08010002


          @misc{ pirsa_PIRSA:08010002,
            doi = {10.48660/08010002},
            url = {https://pirsa.org/08010002},
            author = {Steinacker, Harold},
            keywords = {Quantum Gravity},
            language = {en},
            title = {Emergent gravity from noncommutative gauge theory},
            publisher = {Perimeter Institute},
            year = {2008},
            month = {jan},
            note = {PIRSA:08010002 see, \url{https://pirsa.org}}

Harold Steinacker University of Vienna

Talk Type Scientific Series


We show that the matrix-model for noncommutative U(n) gauge theory actually describes SU(n) gauge theory coupled to gravity. The nonabelian gauge fields as well as additional scalar fields couple to a dynamical metric G_ab, which is given in terms of a Poisson structure. This leads to a gravity theory which is naturally related to noncommutativity, encoding those degrees of freedom which are usually interpreted as U(1) gauge fields. Essential features such as gravitational waves and the Newtonian limit are reproduced correctly. UV/IR mixing is understood in terms of an induced gravity action. The framework appears suitable for quantizing gravity.