The Effective Gravitational Lagrangian and the Energy Momentum Tensor in the Inflationary Universe
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Abstract: (IOP)
The inflationary model proposed by Guth (1981), is based on non-classical behaviour of the energy-momentum tensor. The authors try to evaluate the corrections to the usual linear relation between the scalar curvature and the trace of the energy-momentum tensor, R approximately T, replacing the usual Einstein-Hilbert Lagrangian R by an unknown function f(R) and imposing the inflationary solution upon the scale factor a(t) of the Robertson-Walker metric. Solving for f(R) enables one to evaluate the corrections to the relation R approximately T, which may be developed in powers of R or T at will.- GRAVITATION
- FIELD THEORY: EFFECTIVE LAGRANGIANS
- TENSOR: ENERGY-MOMENTUM
- MODEL: INFLATION
- Einstein equation
- FIELD EQUATIONS: SOLUTION
- NUMERICAL CALCULATIONS
- COSMOLOGICAL MODEL
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