66 citations · 253 across the 19 of their papers we have counts for
20 papers
Consistent Evaluation of the No-Boundary Proposal
Ahmed I. Abdalla, Stefano Antonini, Raphael Bousso +3
We revisit the Hartle-Hawking no-boundary proposal. To extract probabilities, one must use the gravitational path integral (GPI) to compute not only the no-boundary amplitude, but…
The Baby Universe is Fine and the CFT Knows It: On Holography for Closed Universes
Stefano Antonini, Pratik Rath, Martin Sasieta +2
Big bang/big crunch closed universes can be realized in AdS/CFT, even though they lack asymptotically AdS boundaries. With enough bulk entanglement, the bulk Hilbert space of a clo…
A Black Hole Airy Tail
Stefano Antonini, Luca V. Iliesiu, Pratik Rath +1
In Jackiw-Teitelboim (JT) gravity, which is dual to a random matrix ensemble, the annealed entropy differs from the quenched entropy at low temperatures and goes negative. However,…
An apologia for islands
Stefano Antonini, Chang-Han Chen, Henry Maxfield +1
Entanglement islands have played a key role in the recent derivation of the Page curve and other progress on the black hole information problem. Arising from the inclusion of conne…
The gravitational path integral from an observer's point of view
Ahmed I. Abdalla, Stefano Antonini, Luca V. Iliesiu +1
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 describi…
Non-isometry, State Dependence and Holography
Stefano Antonini, Vijay Balasubramanian, Ning Bao +2
We establish an equivalence between non-isometry of quantum codes and state-dependence of operator reconstruction, and discuss implications of this equivalence for holographic dual…
Do holographic CFT states have unique semiclassical bulk duals?
Stefano Antonini, Pratik Rath
We discuss a situation where a holographic CFT state has multiple semiclassical bulk duals. In our example, a given holographic state has two simple, semiclassical descriptions, on…
Magnetic Braneworlds: Cosmology and Wormholes
Stefano Antonini, Luis Gabriel C. Bariuan
We construct 4D flat Big Bang-Big Crunch cosmologies and Anti-de Sitter (AdS) planar eternally traversable wormholes using braneworlds embedded in asymptotically AdS spacetim…
Cosmology from random entanglement
Stefano Antonini, Martin Sasieta, Brian Swingle
We construct entangled microstates of a pair of holographic CFTs whose dual semiclassical description includes big bang-big crunch AdS cosmologies in spaces without boundaries. The…
Holographic measurement in CFT thermofield doubles
Stefano Antonini, Brianna Grado-White, Shao-Kai Jian +1
We extend the results of arXiv:2209.12903 by studying local projective measurements performed on subregions of two copies of a CFT in the thermofield double state and investi…
QFT in Curved Spacetime from Quantum Gravity: proper WKB decomposition of the gravitational component
Giulia Maniccia, Giovanni Montani, Stefano Antonini
Starting from a re-analysis of previous work, we construct the proper low energy quantum field theory (QFT) limit of a full quantum gravity theory in the Born-Oppenheimer approach.…
Accelerating cosmology from gravitational effective field theory
Stefano Antonini, Petar Simidzija, Brian Swingle +2
A large class of cosmologies have big-bang / big crunch spacetimes with time-symmetric backgrounds and asymptotically AdS Euclidean continuations suggesting a possible holog…
Holographic measurement and quantum teleportation in the SYK thermofield double
Stefano Antonini, Brianna Grado-White, Shao-Kai Jian +1
According to holography, entanglement is the building block of spacetime; therefore, drastic changes of entanglement will lead to interesting transitions in the dual spacetime. In…
Holographic measurement and bulk teleportation
Stefano Antonini, Gregory Bentsen, ChunJun Cao +3
Holography has taught us that spacetime is emergent and its properties depend on the entanglement structure of the dual theory. In this paper, we describe how changes in the entang…
Can one hear the shape of a wormhole?
Stefano Antonini, Petar Simidzija, Brian Swingle +1
A large class of flat big bang - big crunch cosmologies with negative cosmological constant are related by analytic continuation to asymptotically AdS traversable wormholes with pl…
Accelerating cosmology from a holographic wormhole
Stefano Antonini, Petar Simidzija, Brian Swingle +1
We consider cosmological models in which the cosmology is related via analytic continuation to a Euclidean asymptotically AdS planar wormhole geometry defined holographically via a…
Cosmology from the vacuum
Stefano Antonini, Petar Simidzija, Brian Swingle +1
We argue that standard tools of holography can be used to describe fully non-perturbative microscopic models of cosmology in which a period of accelerated expansion may result from…
Holographic boundary states and dimensionally-reduced braneworld spacetimes
Stefano Antonini, Brian Swingle
Recently it was proposed that microscopic models of braneworld cosmology could be realized in the context of AdS/CFT using black hole microstates containing an end-of-the-world bra…
Cosmology at the end of the world
Stefano Antonini, Brian Swingle
In the last two decades the Anti-de Sitter/Conformal Field Theory correspondence (AdS/CFT) has emerged as focal point of many research interests. In particular, it functions as a s…
Singularity-free and non-chaotic inhomogeneous Mixmaster in polymer representation for the volume of the universe
Stefano Antonini, Giovanni Montani
We analyze the semiclassical polymer dynamics of the inhomogeneous Mixmaster model by choosing the cubed scale factor as the discretized configurational variable, while the anisotr…