The cosmological vacuum ambiguity, effective actions, and transplanckian effects in inflation

@inproceedings{Schalm2004TheCV,
  title={The cosmological vacuum ambiguity, effective actions, and transplanckian effects in inflation},
  author={K. Schalm and G. Shiu and J. Schaar},
  year={2004}
}
We provide a prescription for parametrizing the vacuum choice ambiguity in cosmological settings. We introduce an arbitrary boundary action representing the initial conditions. A Lagrangian description is moreover the natural setting to study decoupling of high‐energy physics. RG flow affects the boundary interactions. As a consequence the boundary conditions are sensitive to high‐energy physics through irrelevant terms in the boundary action. Using scalar field theory as an example, we derive… Expand

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