Quintessence and false vacuum: Two sides of the same coin?

Title

Quintessence and false vacuum: Two sides of the same coin?

Creator

Pradosh Keshav, M.V.; Arun, Kenath

Description

We studied the late-time acceleration scenarios using a quintessence field initially trapped in a metastable false vacuum state. The false vacuum has non-zero vacuum energy and can drive exponential expansion if not coupled with gravity. Upon decay of the false vacuum, the quintessence field is released and begins to evolve. We assumed conditions where the effective scalar potential gradient must satisfy ?Veff>A, characterised by a pressure term approximately ?p/p>O(?) invoking the string swampland criteria. We then derived the effective potential of the scalar with an upper bound on the coupling constant ?<0.6. Further analysis revealed that Veff shows a slow-roll behaviour for 0.1>?>-0.04 in the effective dark energy equation of state (EoS) -0.8

Source

Pramana - Journal of Physics;Volume;99;Issue;2;Article No.;58;

Date

01-01-2025

Publisher

Springer

Subject

dark energy; false vacuum; Quintessence; string swampland; ?-cold dark matter

Coverage

Pradosh Keshav M.V., Department of Physics and Electronics, Christ University, Bangalore, 560029, India; Arun K., Department of Physics and Electronics, Christ University, Bangalore, 560029, India

Rights

All Open Access; Green Open Access

Relation

ISSN: 3044289; CODEN: PRAMC

Format

online

Language

English

Type

Article

Identifier

https://doi.org/10.1007/s12043-025-02910-x

https://www.scopus.com/pages/publications/105002721990?origin=resultslist