Higgs dark energy in inert doublet model

TL;DR

This paper explores the inert doublet model with two Higgs doublets, proposing that the second doublet can serve as a dark energy candidate to explain late-time cosmic acceleration.

Contribution

It introduces a novel application of the inert doublet model where the second Higgs doublet acts as dark energy without symmetry breaking.

Findings

Second Higgs doublet can drive late-time acceleration

Vacuum expectation value remains zero for dark energy role

Model aligns with quintessential dark energy regime

Abstract

Scalar fields are among the possible candidates for dark energy. This paper is devoted to the scalar fields from the inert doublet model, where instead of one as in the standard model, two SU(2) Higgs doublets are used. The component fields of one SU(2) doublet ($\phi_1$) act in an identical way to the standard model Higgs while the component fields of the second SU(2) doublet ($\phi_2$) are taken to be the dark energy candidate (which is done by assuming that the phase transition in the field has not yet occurred). It is found that one can arrange for late time acceleration (dark energy) by using an SU(2) Higgs doublet in the inert Higgs doublet model, whose vacuum expectation value is zero, in the quintessential regime.