The international seminar on asymptotic safety was founded in spring 2011, with the intention of bringing the asymptotic-safety community together, and providing a platform for talks on asymptotic safety in and beyond quantum gravity, as well as related topics in quantum gravity and quantum field theory.

Upcoming seminars

Bilal Hawashin: The Nordic-walking mechanism and its explanation of deconfined pseudocriticality from Wess-Zumino-Witten theory


Seminar Date:

Many phase transitions can be understood as the spontaneous breaking of a global symmetry of the microscopic system. This is well captured within the framework initially developed by Landau, in which the extend of broken symmetry is quantified by an order parameter field. However, it is well established that not all...

Tim Morris: Ultraviolet finite resummation of perturbative quantum gravity


Seminar Date:

If the metric is chosen to depend exponentially on the conformal factor, and if one works in a gauge where the conformal factor has the wrong sign propagator, perturbative quantum gravity corrections can be partially resummed into a series of terms each of which is ultraviolet finite. These new terms however are not...

Benjamin Knorr: Momentum-dependent field redefinitions in Asymptotic Safety


Seminar Date:

We discuss general momentum-dependent field redefinitions in the context of quantum-gravitational scattering amplitudes in general, and Asymptotic Safety in particular. Implementing such redefinitions at the lowest curvature order, we can bring the graviton propagator into tree-level form, avoiding issues of fiducia...

Marta Picciau: Quantum field theories of relativistic Luttinger fermions


Seminar Date:

We have constructed relativistic versions of Luttinger fermions in analogy to effective low-energy degrees of freedom of non-relativistic solid-state systems. We propose to use these relativistic versions as fundamental degrees of freedom of interacting quantum field theories. Using the spin-base invariant formalism...

Yannick Kluth: Robustness of the derivative expansion in Asymptotic Safety


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We analyse the renormalisation group flow of quantum gravity at sixth order in the derivative expansion within the background field approximation. Non-linear field redefinitions are used to ensure that only essential couplings flow. Working within the universality class of General Relativity, with a vanishing cosmol...

The organizers

If you are interested in attending the seminars and joining the community, please contact Aaron Held or Marc Schiffer to join the corresponding mailing list.

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Astrid Eichhorn

Astrid is an Associate Professor at CP3-Origins, University of Southern Denmark, Villum Young Investigator and Perimeter Institute Visiting Fellow. She works on building connections in quantum gravity: connections between quantum-gravity approaches, connections between fundamental theory and phenomenology, and connections between neighboring research communities. more

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Aaron Held

Aaron works on phenomenological constraints in quantum and classical effective field theories of gravity. Currently, DAAD Prime Fellow at Jena University and The Princeton Gravity Initiative.

Marc Schiffer

Marc works on asymptotically safe gravity-matter systems using functional and lattice methods. Currently, Postdoctoral researcher at Perimeter Institute.