Spacetime as a Feynman diagram: the connection formulation
نویسندگان
چکیده
منابع مشابه
Spacetime as a Feynman diagram: the connection formulation
Spin foam models are the path integral counterparts to loop quantized canonical theories. In the last few years several spin foam models of gravity have been proposed, most of which live on finite simplicial lattice spacetime. The lattice truncates the presumably infinite set of gravitational degrees of freedom down to a finite set. Models that can accomodate an infinite set of degrees of freed...
متن کاملSpacetime as a Feynmann diagram: the connection formulation
Spin foam models are the path integral counterparts to loop quantized canonical theories. In the last few years several spin foam models of gravity have been proposed, most of which live on finite simplicial lattice spacetime. The lattice truncates the presumably infinite set of gravitational degrees of freedom down to a finite set. Models that can accomodate an infinite set of degrees of freed...
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In a recent paper [1] we investigated Potts models on “thin” random graphs – generic Feynman diagrams, using the idea that such models may be expressed as the N → 1 limit of a matrix model. The models displayed first order transitions for all q > 2, giving identical behaviour to the corresponding Bethe lattice. We use here one of the results of [1] namely a general saddle point solution for a q...
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Abstract By re-interpreting the special relativity (SR) postulates based on Euclidean 4-space-time , a geometrical model is formulated called the Euclidean Space-Time (EST) diagram. The EST diagram is a velocity vector model with a real time parameter along the 4th dimension and consequently has a (++++) metric. The model is governed by a circular function geometry and the relativistic variatio...
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The Hopf algebra structure underlying Feynman diagrams which governs the process of renormalization in perturbative quantum field theory is reviewed. Recent progress is briefly summarized with an emphasis on further directions of research.
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ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 2000
ISSN: 0264-9381,1361-6382
DOI: 10.1088/0264-9381/18/1/308