Erlangen 2026 – wissenschaftliches Programm
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GR: Fachverband Gravitation, Relativistische Astrophysik und Kosmologie
GR 15: Quantum Gravity and Quantum Cosmology II
GR 15.3: Vortrag
Donnerstag, 19. März 2026, 16:45–17:00, KH 02.012
A Relational Model of Gravitationally induced Decoherence for Photons — •Roman Kemper1, Kristina Giesel1, and Max Joseph Fahn2 — 1Friedrich-Alexander Universität Erlangen-Nürnberg, Germany — 2Università di Bologna, Bologna Italy
This talk discusses the formulation of a decoherence model for Maxwell theory coupled to linearised gravity. The resulting dynamics are described by a master equation, which governs the evolution of the electromagnetic subsystem under the effective influence of the gravitational environment. The master equation is derived from the underlying action using the relational formalism to access the physical sector and the open quantum system framework to describe the effective influence of linearised gravity on Maxwell theory at the quantum level. Differences and similarities with existing models in the literature, including approaches based on scalar fields or alternative methods for accessing the physical sector, are discussed.
Keywords: Quantum Gravity; Decoherence Models; Relational Formalism; Open Quantum Systems