Quantum Gravity (QG) remains one of the most dynamic and challenging frontiers in fundamental physics. While constructing a complete and consistent theory of QG continues to be a formidable task, the phenomenology of quantum gravity has developed rapidly over the past two decades. This field brings together theorists and experimentalists across particle physics, cosmology, and astroparticle physics. Some efforts are closely connected to foundational theoretical frameworks, while others focus on the analysis of high-precision data from state-of-the-art experiments in astroparticle physics (neutrinos, gravitational waves, X-rays, gamma rays), particle physics facilities, and tabletop experiments.

The international conference “Bridging High and Low Energies in Search of Quantum Gravity 2026” (BridgeQG 2026) is the second annual conference of COST Action CA23130.

Its objective is to strengthen dialogue and collaboration among the diverse communities addressing the challenges of QG phenomenology. The program will feature invited lectures presenting recent theoretical and experimental advances in both high- and low-energy approaches to quantum gravity. The conference will then have a selection of contributed talks focusing on current high-impact topics in the field.

BridgeQG 2026 will take place in Varna, Bulgaria, from 6 July to 9 July 2026. The event is supported by the COST Association through COST Action CA23130.

There is no registration fee. Participants who are not funded by COST are expected to cover their own expenses—including travel, accommodation, meals, and local transportation—through personal or institutional funding sources. 

For more information, please refer to CA23130 BridgeQG web site.

Confirmed speakers:

Luca Buoninfante (University of Santiago de Compostela)
Francesco Del Porro (Niels Bohr Institute, University of Copenhagen)
Max Joseph Fahn (University of Bologna)
Adrian Kent (University of Cambridge (DAMTP))
Kristian Piscicchia (Centro Ricerche Enrico Fermi (CREF))
Alberto Rosales de Leon (University of Łódź)
Hendrik Ulbricht (University of Southampton)
Alba Domi, ECAP, Friedrich Alexander-Universität (FAU), Germany
Ladina Hausmann, ETH Zürich

Additionals invited speakers TBC

Acknowledegments

This conference is supported by COST (European Cooperation in Science and Technology). COST is a funding agency for research and innovation networks. COST Actions help connect research initiatives across Europe and enable scientists to grow their ideas by sharing them with their peers. This boosts their research, career and innovation.