Cosmology from random entanglement
A bstract We construct entangled microstates of a pair of holographic CFTs whose dual
semiclassical description includes big bang-big crunch AdS cosmologies in spaces without …
semiclassical description includes big bang-big crunch AdS cosmologies in spaces without …
Influence phase of a dS observer. Part I. Scalar exchange
R Loganayagam, O Shetye - Journal of High Energy Physics, 2024 - Springer
A bstract Inspired by real-time computations in AdS black holes, we propose a method to
obtain the influence phase of a cosmological observer by calculating the on-shell action on …
obtain the influence phase of a cosmological observer by calculating the on-shell action on …
De Sitter space is sometimes not empty
V Balasubramanian, Y Nomura, T Uga** - Journal of High Energy Physics, 2024 - Springer
A bstract Multiple lines of evidence suggest that the Hilbert space of an isolated de Sitter
universe is one dimensional but can appear larger when probed by a gravitating observer …
universe is one dimensional but can appear larger when probed by a gravitating observer …
The gravitational path integral from an observer's point of view
One of the fundamental problems in quantum gravity is to describe the experience of a
gravitating observer in generic spacetimes. In this paper, we develop a framework for …
gravitating observer in generic spacetimes. In this paper, we develop a framework for …
Closed universes in two dimensional gravity
M Usatyuk, ZY Wang, Y Zhao - arxiv preprint arxiv:2402.00098, 2024 - arxiv.org
We study closed universes in simple models of two dimensional gravity, such as Jackiw-
Teiteilboim (JT) gravity coupled to matter, and a toy topological model that captures the key …
Teiteilboim (JT) gravity coupled to matter, and a toy topological model that captures the key …
Holographic black hole cosmologies
A Sahu, M Van Raamsdonk - arxiv preprint arxiv:2411.14673, 2024 - arxiv.org
We describe and study a holographic construction of big-bang/big-crunch cosmological
spacetimes where the matter consists of a lattice of black holes. The cosmological spacetime …
spacetimes where the matter consists of a lattice of black holes. The cosmological spacetime …
Closed universes, factorization, and ensemble averaging
M Usatyuk, Y Zhao - arxiv preprint arxiv:2403.13047, 2024 - arxiv.org
We study closed universes in holographic theories of quantum gravity. We argue that within
any fixed theory, factorization implies there is one unique closed universe state. The wave …
any fixed theory, factorization implies there is one unique closed universe state. The wave …
Holographic screen sequestration
A Chatwin-Davies, P Leung, GN Remmen - Physical Review D, 2024 - APS
Holographic screens are codimension-one hypersurfaces that extend the notion of apparent
horizons to general (non-black hole) spacetimes and that display interesting thermodynamic …
horizons to general (non-black hole) spacetimes and that display interesting thermodynamic …
Holographic motivations and observational evidence for decreasing dark energy
M Van Raamsdonk, C Waddell - arxiv preprint arxiv:2406.02688, 2024 - arxiv.org
Negative lambda gravitational effective field theories dual to holographic CFTs have
potentially realistic cosmological solutions. Generic cosmological solutions of these effective …
potentially realistic cosmological solutions. Generic cosmological solutions of these effective …
Magnetic Braneworlds: Cosmology and Wormholes
S Antonini, LGC Bariuan - arxiv preprint arxiv:2405.18465, 2024 - arxiv.org
We construct 4D flat Big Bang-Big Crunch cosmologies and Anti-de Sitter (AdS) planar
eternally traversable wormholes using braneworlds embedded in asymptotically AdS ${} _5 …
eternally traversable wormholes using braneworlds embedded in asymptotically AdS ${} _5 …