  Observational consequences of inflationary cosmology in the holographic dual
of the Randall-Sundrum type II braneworld scenario, as motivated by the AdS/CFT
correspondence, are investigated. High energy corrections to the standard
four-dimensional Friedmann equation induce a corresponding modification to the
form of the single-field inflationary consistency equation based on Einstein
gravity. The degree of departure from the standard expression is determined by
the ratio, r, of the primordial tensor and scalar perturbation amplitudes and
the coefficient, c, of the conformal anomaly in the dual gauge theory. It is
found that a necessary condition for detecting such a correction with the next
generation of cosmic microwave background (CMB) polarization experiments is
that r >= 0.06. The bound is tightened to r > 0.3 for values of the central
charge that are compatible with known compactifications of type IIB string
theory as parametrized in terms of F-theory compactification on Calabi-Yau
four-folds. This is close to the present upper bounds inferred from combined
observations of the CMB anisotropy power spectrum and high redshift surveys. We
conclude that if such modifications to the inflationary consistency equation
are to be observable, the gravitational wave background should be detected in
the near future. A further consequence of the non-standard dynamics at high
energies is that the initial state of the universe is a quiescent singularity
with a finite density and pressure.
