Gaussian approximation of λφ4 theory in (3+1)-dimensional spatially flat Robertson-Walker space

Details Gaussian approximation of λφ4 theory in (3+1)-dimensional spatially flat Robertson-Walker space Gaussian approximation of λφ4 theory in (3+1)-dimensional spatially flat Robertson-Walker space

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvd..39.1674p&link_type=abstract

Physical Review D (Particles and Fields), Volume 39, Issue 6, 15 March 1989, pp.1674-1680

Physics

1

Lagrangian And Hamiltonian Approach, Renormalization, Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

We investigate λφ4 theory within the Gaussian approximation in spatially flat Robertson-Walker space in 3+1 dimensions. After having performed an adiabatic expansion for one of the ansatz functions, we find that the renormalization of the energy-momentum tensor provides two additional constraints which have to be satisfied by the bare couplings. These conditions force the theory to be trivial after renormalization.

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