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Path Integral Quantization of Cosmological Perturbations

S. Anderegg, V. Mukhanov

hep-tharXiv:hep-th/9403091

Abstract

We derive the first order canonical formulation of cosmological perturbation theory in a Universe filled by a few scalar fields. This theory is quantized via well-defined Hamiltonian path integral. The propagator which describes the evolution of the initial (for instance, vacuum) state, is calculated.

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