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

Alexey Kalugin: Beyond Schwinger-DeWitt: higher-order minimal and nonminimal operators, off-diagonal expansions for operator functions, and Mellin-Barnes representations


Seminar Date:

We present an overview of generalizations of the heat kernel technique, a fundamental tool in QFT, gauge theory, and quantum gravity. As the classical Schwinger-DeWitt technique is restricted to Laplace-type operators, we propose extensions thereof to other operator types. First, we construct off-diagonal heat kerne...

Giovanni Oglialoro: Towards gauge independence in asymptotically safe quantum gravity


Seminar Date:

We study gauge dependence in proper-time renormalisation group flows for asymptotically safe quantum gravity. Working in an essential scheme, we use field redefinitions to separate redundant off-shell contributions from the on-shell running of physical couplings. We consider two approximations: in the first, we work...

Benjamin Knorr: The pole truth: an analytical graviton propagator from Asymptotic Safety


Seminar Date:

We derive an analytical approximation for the graviton propagator from Asymptotic Safety. We find neither extra poles nor indications of unitarity or causality violations in the spin-two sector. Our results strengthen the case that Asymptotic Safety does not introduce new degrees of freedom, and thus propagates the ...

Gabriel Assant: Spectral Functions of Lorentzian Quantum Gravity


Seminar Date:

We compute spectral functions of graviton modes in Lorentzian quantum gravity, interpolating between classical general relativity and an asymptotically safe ultraviolet fixed point. Using functional renormalisation adapted for theories in Lorentzian signature, and enhanced by new symmetry conditions to account for u...

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 Professor in Theoretical Physics at Heidelberg University. She works on quantum gravity and its phenomenology in particle physics, black holes and cosmology.

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Aaron Held

Aaron works on phenomenological constraints in quantum and classical effective field theories of gravity. Currently, Philippe Meyer Junior Research Chair at Ecole Normale Superieure in Paris.

Marc Schiffer

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