Inflation with improved D3-brane potential and the fine tunings associated with the model

Abstract

We investigate brane-antibrane inflation in a warped deformed conifold background that includes contributions to the potential arising from imaginary anti-self-dual (IASD) fluxes including the term with irrational scaling dimension discovered recently. We find that the model can give rise to required number of e-foldings; observational constraint on COBE normalization is easily satisfied and low value of the tensor to scalar ratio of perturbations is achieved. We observe that these corrections to the effective potential help in relaxing the severe fine tunings associated with the earlier analysis.

8 pages, 4 figures; typos corrected, minor clarifications and new refs added, to appear in epjc

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• The Cosmological OTOC: A New Proposal for Quantifying Auto-Correlated Random Non-Chaotic Primordial Fluctuations
• Entanglement negativity in de Sitter biverse from Stringy Axionic Bell pair: An analysis using Bunch-Davies vacuum
• Cosmological Geometric Phase From Pure Quantum States: A study without/with having Bell's inequality violation
• Warming up D3 brane motion in the background of D5 brane and Inflation