Research Group Kristina Giesel

The research group is part of the Institute for Theoretical Physics III (Quantum Gravity) and the Erlangen Center for Astroparticle Physics (ECAP) at the Department of Physics at the FAU Erlangen-Nürnberg. The research in the group focuses on topics in quantum gravity including the formulation of the Quantum Einstein Equations in Loop Quantum Gravity and application of the dynamics to cosmology and black holes. Furthermore we study open quantum systems including gravity and investigate gravitationally induced decoherence.

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News

Welcome Michał Bobula

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May 1, 2025

We warmly welcome Michał Bobula, who is visiting us from 1 to 31 May 2025. He is a PhD student at the University of Wrocław in Tomasz Pawłowski’s group. Michał Bobula works on models of gravitational collapse and black holes using effective symmetry reduced models inspired by loop quantum gravity.

Welcome Matteo Bruno

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April 1, 2025

We warmly welcome Matteo Bruno, who is visiting us from 1 April to 30 June 2025. He is a PhD student at the Sapienza – Università di Roma in the group of Giovanni Montani. Matteo Bruno is working on symmetry reduced models in loop quantum gravity in the context of cosmology.

Paper on regular black holes accepted in Physical Review D

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March 21, 2025

The paper of Kristina Giesel, Hongguang Liu, Parampreet Singh and Stefan Weigl was recently accepted by Physical Review D. The paper This article contains further applications of the formalism developed in our previous work in Phys.Rev.D 110 (2024) 10, 104017, with a particular focus on regular black holes models as a special case of polymerised LTB solutions. […]

Congratulations Roman Kemper

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March 9, 2025

We warmly congratulate Roman Kemper on his PhD scholarship from the foundation of the Evangelischen Studienwerk Villigst.

Congratulations Ashay Sathe

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March 9, 2025

We warmly congratulate Ashay Sathe on his scholarship from the German Academic Scholarship Foundation and on his acceptance into the Marianne- Plehn Programme of the German Academic Scholarship Foundation.

Grant for BIRS workshop on recent development of quantum gravity and applications to cosmology and black hole physics approved

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March 9, 2025

Banff International Research Station Workshop “Recent Development of Quantum Gravity and Applications to Cosmology and Black Hole Physics” has been approved. The worksop will be take place in May 2026 at Institute for Advanced Study in Mathematics in Hangzhou, China. Organisors of the workshop are Anzhong Wang (Baylor University), Rong-Gen Cai (Institute of Theoretical Physics, […]

FAU2 Workshop 2025

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March 9, 2025

This years FAU^2 workshop is organised by Renata Ferrero, Kristina Giesel and Muxin Han and will take place in ECAP Laboratory from May 20-22, 2025 and aims to explore the interplay between different approaches of quantum gravity at the Planck scale, such as for instance canonical and covariant loop quantum gravity, group field theory and […]

New Paper: Linking edge modes and geometrical clocks in linearised gravity

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March 9, 2025

In this paper we investigate the relation between geometrical clocks usually used in the canonical formulation of general relativity and edge modes mostly used in the canonical phase space formulation. We show that with a suitable extension of the ADM phase space different from the one in the existing literature a relation can be established […]

Launch of new website

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March 9, 2025

The research group of Kristina Giesel has a new website that provides information on current research topics, new publications by the group and general news about the group. Further sections with more details on the research group’s most recent publications and a list of references with reviews and lecture notes on topics relevant to the […]

Research Activities

The research in the group covers topics in the dynamics of Loop Quantum Gravity encoded in the Quantum Einstein Equations with applications in the context of quantum cosmology and the quantum gravitational collapse as well as open quantum systems involving gravity. We investigate foundational questions such as the role of physical (quantum) reference frames in quantum gravity as well formulate models and investigate their physical implications. More information on the individual research topics can be found using the links below.

Relational Formalism in the dynamics of (Quantum) Gravity

Physical (Quantum) Reference Frames in the Quantum Einstein Equations and Systems with Gravity

Quantum Einstein Equations: Applications in Cosmology

Quantum Cosmology

Quantum Einstein Equations: Applications in Spherically Symmetric Models

Quantum Gravitational Collapse and Quantum Black Holes

Open Quantum Systems

Gravitational Decoherence and Applications in Astroparticle Physics

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