de Sitter Excited State in Heterotic E8×E8${\rm E}_8 \times {\rm E}_8$ Theory

Abstract A novel duality sequence is devised to study late‐time cosmology in the heterotic setup of Horava and Witten with dynamical walls that are moving towards each other. Remarkably, the dimensionally reduced 4‐dimensional theory does not violate NEC and no bouncing or ekpyrotic phase is observed. Instead, the 4‐dimensional setup shows a transient de Sitter phase that lies well within the trans‐Planckian bound. This opens up a myriad of possibilities of addressing both phenomenological and cosmological issues, with focus on an axionic cosmology with temporally varying axionic coupling.

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Publication Details

Journal
Fortschritte der Physik
Published
2025-11-05
DOI
https://doi.org/10.1002/prop.70047
Primary Topic
Cosmology and Gravitation Theories
Type
article
Field-Weighted Citation Impact
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article

de Sitter Excited State in Heterotic E8×E8${\rm E}_8 \times {\rm E}_8$ Theory

Archana Maji, Bohdan Kulinich, Keshav Dasgupta, Suddhasattwa Brahma et al.
Fortschritte der Physik
Cosmology and Gravitation Theories
article

de Sitter Excited State in Heterotic E8×E8${\rm E}_8 \times {\rm E}_8$ Theory

Archana Maji, Bohdan Kulinich, Keshav Dasgupta, Suddhasattwa Brahma, Radu Tătar, Pichai Ramadevi
article en

Abstract

Abstract A novel duality sequence is devised to study late‐time cosmology in the heterotic setup of Horava and Witten with dynamical walls that are moving towards each other. Remarkably, the dimensionally reduced 4‐dimensional theory does not violate NEC and no bouncing or ekpyrotic phase is observed. Instead, the 4‐dimensional setup shows a transient de Sitter phase that lies well within the trans‐Planckian bound. This opens up a myriad of possibilities of addressing both phenomenological and cosmological issues, with focus on an axionic cosmology with temporally varying axionic coupling.

Fortschritte der PhysikVol. 73(12)
University of Liverpool (GB), Indian Institute of Technology Bombay (IN), McGill University (CA), University of Edinburgh (GB)
Openalex Percentile: Top 77%
Cosmology and Gravitation Theories
DOISourceOpenAlex
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de Sitter Excited State in Heterotic E8×E8${\rm E}_8 \times {\rm E}_8$ Theory — Archana Maji, Bohdan Kulinich, et al. · Fortschritte der Physik (2025) | TGRS Research Map | TGRS