Feynman Propagator for a Free Scalar Field on a Causal Set

Details Feynman Propagator for a Free Scalar Field on a Causal Set Feynman Propagator for a Free Scalar Field on a Causal Set

2009-09-04

arxiv.org/abs/0909.0944v2

Phys.Rev.Lett.103:180401,2009

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, 2 plots. Minor updates to match published version

Scientific paper

10.1103/PhysRevLett.103.180401

The Feynman propagator for a free bosonic scalar field on the discrete
spacetime of a causal set is presented. The formalism includes scalar field
operators and a vacuum state which define a scalar quantum field theory on a
causal set. This work can be viewed as a novel regularisation of quantum field
theory based on a Lorentz invariant discretisation of spacetime.

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