Two tunnels to inflation

Testing two-field inflation

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We derive accurate semianalytic formulas for the power spectra from two-field inflation assuming an arbitrary poten...

Two-Stage Inflation in Supergravity

We investigate the viability of a two-stage inflationary scenario in the context of supergravity, so as to resolve the problem of initial conditions for hybrid inflation. We allow for non-renormalizable terms in the superpotential and consider the most general form of the Kähler potential and the gauge kinetic function. We construct a model with two stages of inflation, the first driven by D-te...

Two-Stage Inflation as a Solution to the Initial Condition Problem of Hybrid Inflation

We address the issue of fine-tuning of the initial field configuration that can lead to hybrid inflation in the context of global supersymmetry. This problem is generated by the difference between the energy scale at which the Universe emerges from the Planck era and the inflationary scale implied by the COBE observations: V 1/4 ∼ 10−3mPl. We propose a scenario with two stages of inflation. The...

Classification of unknotting tunnels for two bridge knots

In this paper, we show that any unknotting tunnel for a two bridge knot is isotopic to either one of known ones. This together with Morimoto–Sakuma’s result gives the complete classification of unknotting tunnels for two bridge knots up to isotopies and homeomorphisms. AMS Classification 57M25; 57M05

From Inflation to More Inflation, Disinflation and Low Inflation