Massless Scalar Field Theory in a Quantised Space-Time

Details Massless Scalar Field Theory in a Quantised Space-Time Massless Scalar Field Theory in a Quantised Space-Time

1995-01-23

arxiv.org/abs/hep-th/9501108v2

Class.Quant.Grav.12:637-650,1995

Physics

High Energy Physics

High Energy Physics - Theory

23 pages, mtexsis (TeXsis), includes 2 figure files.

Scientific paper

10.1088/0264-9381/12/3/004

A method is developed to construct a non-local massless scalar field theory in a flat quantised space-time generated by an operator algebra. Implicit in the operator algebra is a fundamental length scale of the space-time. The fundamental two-point function of free fields is constructed by assuming that the causal Green functions still have support on the light cone in the operator algebra quantised space-time. In contrast to previous stochastic approaches, the method introduced here requires no explicit averaging over spacetime coordinates. The two- and four-point functions of~$g \varphi^4$ theory are calculated to the one-loop level, and no ultraviolet divergences are encountered. It is also demonstrated that there are no IR divergences in the processes considered.

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