In Starobinsky inflation, α-vacua produce small corrections to the scalar spectral index and its runnings that are tightly constrained by Planck data and sub-millimeter gravity bounds.
Sub-millimeter tests of the gravitational inverse-square law.Phys
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Choice of Quantum Vacuum for Inflation Observables
In Starobinsky inflation, α-vacua produce small corrections to the scalar spectral index and its runnings that are tightly constrained by Planck data and sub-millimeter gravity bounds.