Dual symmetry and the vacuum energy

TL;DR

This paper introduces a new hidden dual symmetry in flat Friedmann-Robertson-Walker gravity models that naturally cancels the cosmological constant, offering a novel perspective on vacuum energy.

Contribution

It uncovers a previously unknown symmetry in gravity that, when applied, eliminates the cosmological constant in flat FRW models.

Findings

Identifies a hidden dual symmetry in flat FRW gravity.

Shows this symmetry leads to the vanishing of the cosmological constant.

Provides a new interpretation of vacuum energy in cosmology.

Abstract

In this work we present a new hidden symmetry in gravity for the scale factor in the FRW model, for $k=0$. This exact symmetry vanishes the cosmological constant. We interpret this hidden symmetry as a dual symmetry in the sense that appears in the string theory.