2010

A Unified Approach to Cosmic Acceleration

Park, Minjoon, Watson, Scott, Zurek, Kathryn M.

Understand

We present a unified framework for the study of late time cosmic acceleration.

Using methods of effective field theory, we show that existing proposals for late time acceleration can be subsumed in a single framework, rather than many compartmentalized theories.
We construct the most general action consistent with symmetry principles, derive the background and perturbation evolution equations, and demonstrate that for special choices of our parameters we can reproduce results already existing in the literature.
Lastly, we lay the foundation for future work placing phenomenological constraints on the parameters of the effective theory.

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2024
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