Using the Feynman-Vernon influence functional approach, we study the effects of quantum noise of gravitons on particles. These effects manifest as a stochastic tensorial force whose correlator is given by the graviton noise kernel associated with the Hadamard function of the quantized gravitational field. We solve the corresponding Langevin equation to obtain the fluctuations of particle...
Exploring the dynamics of the early universe and black holes unveils profound insights into the interplay between general relativity and quantum fields. Important phenomena emerge when gravitational and/or field interactions are strong, and/or when quantum effects become prominent. Notable examples include Hawking's proposal on the evaporation of black holes, Penrose's conjecture on the...
A selection of 8 poster contributors give a "flash talk", i.e. a short talk of around 3 minutes, presenting their poster. The list is the following:
- "Cross-scale correlations and interactions in wavelet-based quantum field theory" by Dominic Lewis.
- "Kinematic and energy properties of dynamical regular black holes" by Sebastian Murk.
- "Inference and Fine-Tuning in Causal Explanations of...
"The Einstein Equivalence Principle (EEP), stating that all laws of physics take their special-relativistic form in any local inertial (classical) reference frame, lies at the core of general relativity.
Because of its fundamental status, this principle could be a very powerful guide in formulating physical laws at regimes where both gravitational and quantum effects are relevant. The...
Three foundational aspects will be discussed in which relational approaches offer insight into developing a background-independent description of quantum spacetime: the notions of events, diffeomorphisms and the assumption underlying quantum probability assignments. The first aspect concerns the notion of events and their localisation, which fundamentally differ in quantum theory and...
Quantum non-Markovianity—the influence of an external memory on a system’s dynamics—has posed longstanding technical and conceptual challenges. Recently, significant insight was transferred from the field of quantum causal structures, highlighting the role of interventions and multi-time correlations. In this talk, I will review the causal-structure approach to non-Markovian multi-time...
