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

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.

6 pages, no figures

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• TCC bounds on the static patch of de Sitter space
• Limitations of an Effective Field Theory Treatment of Early Universe Cosmology
• Accelerated paths and Unruh effect I: scalars and fermions in Anti De Sitter spacetime
• What if string theory has a de Sitter excited state?
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• de Sitter State in Heterotic String Theory
• Coherent States in M-Theory: A Brane Scan using the Taub-NUT
• A Computational Companion to Transient de Sitter and Quasi de Sitter States in SO(32) and E_8 X E_8 Heterotic String Theories I: Formalisms
• The four-dimensional null energy condition as a swampland conjecture
• de Sitter Excited State in Heterotic E_8 x E_8 Theory