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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Probabilistic Spacetimes
 Káninský, Jakub ; Svítek, Otakar (advisor) ; Žofka, Martin (referee)
Probabilistic Spacetime is a simple generalization of the classical model of spa- cetime in General Relativity, such that it allows to consider multiple metric field realizations endowed with probabilities. The motivation for such a generalization is a possible application in the context of some quantum gravity approaches, na- mely those using the path integral. It is argued that this model might be used to restrict the precision of the geometry on small scales without postulating discrete structure; or it may be used as an effective description of a probabilistic geometry resulting from a full-fledged quantum gravity computation.
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Dynamics of causal sets
 Káninský, Jakub ; Svítek, Otakar (advisor) ; Žofka, Martin (referee)
The causal set theory represents a possible approach to quantum gravity. It is based upon two leading concepts, causality and discreteness. The causal set, embodying the fundamental structure, forms the discrete substratum for spacetime. Relations to the continuous spacetime are then studied by kinematics while the dynamics' task is to provide a set of rules that would conduct the process of formation. Within this thesis we give a coherent introduction to the causal set theory, focusing on the classical dynamics, in particular its general form called the classical sequential growth. In the sequel, we explore some of the applications, taking advantage of growth simulations.
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