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hep-th2026
Density matrix of de Sitter JT gravity
Wilfried Buchmuller, Alexander Westphal
Jackiw-Teitelboim (JT) gravity in two-dimensional de Sitter space is an intriguing toy model for a quantum mechanical description of an inflationary phase of the universe, includin…
hep-th2024
DeWitt wave functions for de Sitter JT gravity
Wilfried Buchmuller, Arthur Hebecker, Alexander Westphal
Jackiw-Teitelboim (JT) gravity in two-dimensional de Sitter space is an intriguing model for cosmological "wave functions of the universe". Its minisuperspace version already conta…
hep-th2024
End-of-the-World Branes and Inflationary Predictions for Rocky and Swampy Landscapes
Bjoern Hassfeld, Arthur Hebecker, Alexander Westphal
Making cosmological predictions in a multiverse is a fundamental theoretical challenge. Assuming that (quasi-)de Sitter vacua are quantum mechanically described by a finite-dimensi…