4 papers · 1 filter
Spatially flat cosmological quantum spacetimes
Christian GaÃ, Harold C. Steinacker
We recently described a cosmological quantum spacetime of vanishing spatial curvature, which can be considered as background for the IKKT matrix model, assuming that the resulting…
Modified gravity at large scales on quantum spacetime in the IKKT model
Harold C. Steinacker
The gravitational dynamics of 3+1 dimensional covariant quantum spacetime in the IKKT or IIB matrix model is studied at one loop, combining the Yang-Mills-type matrix action with t…
Dynamical Covariant Quantum Spacetime with Fuzzy Extra Dimensions in the IKKT model
Alessandro Manta, Harold C. Steinacker
We consider general FLRW covariant quantum spacetimes with fuzzy extra dimensions as classical solutions of the IKKT mat…
General Relativity in IIB Matrix Model
Pei-Ming Ho, Hikaru Kawai, Harold C. Steinacker
The matrix models are non-perturbative formulations of string theory, from which many believe that spacetime arises. The matrix fluctuations around the spacetime thus created shoul…