# An effective theory of initial conditions in inflation

@article{Collins2005AnET, title={An effective theory of initial conditions in inflation}, author={Hael Collins and Richard Holman}, journal={arXiv: High Energy Physics - Theory}, year={2005} }

We examine the renormalization of an effective theory description of a general initial state set in an isotropically expanding space-time, which is done to understand how to include the effects of new physics in the calculation of the cosmic microwave background power spectrum. The divergences that arise in a perturbative treatment of the theory are of two forms: those associated with the properties of a field propagating through the bulk of space-time, which are unaffected by the choice of the…

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