Causal Sets Dynamics: Review & Outlook

NEB 15 – Recent Developments in Gravity

Wallden, Petros^1,2

University of Athens, Physics Department, Nuclear and Particle Physics Section, Panepistimiopolis 157-71, Ilissia Athens, Greece^1

Technological Educational Institute (TEI) of Chalkida, General Science Department, Psahna-34400, Greece^2

关键词: Causal relations;    Classical dynamics;    Complete theory;    Quantum dynamics;    Quantum gravity;    Space-time element;    Spacetime;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/453/1/012023/pdf
DOI  :  10.1088/1742-6596/453/1/012023

来源: IOP

【 摘 要 】

Causal sets is an approach to quantum gravity, where spacetime is replaced by a causal set. It is fundamentally discrete, and the causal relations between spacetime elements is the only structure that remains. A complete theory should have (i) kinematics (ii) dynamics and (iii) phenomenology. In this contribution we will explore the dynamical part of the theory, focusing on recent developments. We will analyse (a) classical dynamics of the causal set, (b) quantum dynamics of matter and fields on a classical causal set and finally (c) quantum dynamics of the causal set.