Phantom scalar fields result in inflation rather than Big Rip

TL;DR

This paper shows that by surgically removing phantom regions in scalar field solutions, the universe avoids a Big Rip and instead undergoes standard inflation, providing a new perspective on cosmic evolution.

Contribution

It introduces a domain surgery method to eliminate Big Rip scenarios in scalar field models, replacing them with inflationary behavior.

Findings

Elimination of Big Rip through domain surgery

Transition from phantom regions to inflationary expansion

Stable cosmic evolution without singularities

Abstract

There exists a variety of exact solutions of the scalar field Einstein equations, allowing for ``phantom regions'' with the negative kinetic field term. These regions can be cut out, their boundaries being sewn together in such a way that neither the scale factor (along with its first two derivatives) nor density or pressure will experience a jump. Such a domain surgery eliminates the ``Big Rip'' scenario, substituting for it the standard inflation.