Seminar and lectures by Harold Steinacker

In the period 27th of February – 3rd of March, Harold Steinacker (U. of Vienna) will visit the unit. He will give a review talk on Tuesday 28th at 13:30 in the Mirzakhani room, whose title and abstract read respectively:

Emergent 3+1-dimensional gravity from the IKKT matrix model

A mechanism for a 3+1-dimensional gravity on quantized branes in the IKKT matrix model is discussed. The Einstein-Hilbert action arises in a well-defined way as a quantum effect on suitable backgrounds, as part of a higher-spin extended gauge theory. This can be seen as emergent gravity arising from the open string sector.

Moreover, he will give a number of lectures on deformation quatization and matrix models according to the following schedule:

Lecture 1, Monday, 13:30: “A lightning introduction to quantization of symplectic spaces”
I will give an informal introduction to the concepts of quantization which are underlying the following talks


Lecture 2, Tuesday, 14:30: “Quantum Geometry, quasi-coherent states and string modes”
A general formalism will be discussed which allows to extract (quantum) geometries from matrix configurations

Lecture 3, Thursday, 13:00: “Covariant Quantum spaces and higher spin

”
The emergence of higher-spin gauge theory on certain types of “covariant” quantum spaces in Yang-Mills matrix models will be discussed

Lecture 4, Thursday, 15:00: “On the one-loop effective action for the IKKT matrix model model”
If we still have energy, I can explain the computation of one-loop effective action in the maximally supersymmetric IKKT
 matrix model, and the relation with IIB supergravity and 3+1-dimensional emergent gravity