English

Four-dimensional de Sitter space is a Glauber-Sudarshan state in string theory

High Energy Physics - Theory 2021-08-06 v1 General Relativity and Quantum Cosmology

Abstract

We show that four-dimensional de Sitter space is a Glauber-Sudarshan state, i.e. a coherent state, over a supersymmetric solitonic background in full string theory. We argue that such a state is only realized in the presence of temporally varying degrees of freedom and including quantum corrections, with supersymmetry being broken spontaneously. On the other hand, fluctuations over the resulting de Sitter space is governed by the Agarwal-Tara state, which is a graviton (and flux)-added coherent state. Once de Sitter space is realized as a coherent state, and not as a vacuum, its ability to remain out of the swampland as well as issues regarding its (meta)stability, vacuum energy, and finite entropy appear to have clear resolutions.

Keywords

Cite

@article{arxiv.2007.00786,
  title  = {Four-dimensional de Sitter space is a Glauber-Sudarshan state in string theory},
  author = {Suddhasattwa Brahma and Keshav Dasgupta and Radu Tatar},
  journal= {arXiv preprint arXiv:2007.00786},
  year   = {2021}
}

Comments

6 pages, no figures

R2 v1 2026-06-23T16:47:06.775Z