140 citations · 522 across the 27 of their papers we have counts for
29 papers
Before the Bang: Wormholes at the Dawn of the Universe
Panos Betzios, Paul Ghiringhelli, Ioannis D. Gialamas +1
This essay discusses recent progress on Euclidean wormholes as candidate contributions to the Universe's initial quantum state. The comparison with the Hartle-Hawking no-boundary p…
A Menagerie of Wormholes and Cosmologies in the Gravitational Path Integral
Panos Betzios, Paul Ghiringhelli, Ioannis D. Gialamas +1
We analyse a variety of Euclidean saddles in the gravitational path integral, with asymptotic AdS boundary conditions, in a class of Einstein-Scalar-Maxwell models. These include s…
Bubbling wormholes and matrix models
Panos Betzios, Ji Hoon Lee, Olga Papadoulaki +1
The thermofield double state entangles two copies of a CFT via a sum over energy eigenstates and is dual to the two-sided eternal black hole. We explore an analogous construction u…
Holographic shear correlators at low temperatures, and quantum
Alexandros Kanargias, Elias Kiritsis, Sameer Murthy +2
The strongly-coupled 3-dimensional theory, holographically dual to black branes at fixed chemical potential $\muext$ and temperature is considered in AdS Einstein-Max…
Near-extremal quantum cross-section for charged fields and superradiance
Panos Betzios, Olga Papadoulaki, Yanjun Zhou
We study the scattering and absorption properties of charged scalar fields on a near-extremal Reissner-Nordström black hole background. We show that in this low-temperature regime…
Visions in Quantum Gravity
Luca Buoninfante, Benjamin Knorr, K. Sravan Kumar +36
To deepen our understanding of Quantum Gravity and its connections with black holes and cosmology, building a common language and exchanging ideas across different approaches is cr…
Magnetic Anti-de Sitter Wormholes as seeds for Higgs Inflation
Panos Betzios, Ioannis D. Gialamas, Olga Papadoulaki
We show how certain types of magnetic asymptotically Anti-de Sitter Euclidean wormholes can catalyze the onset of inflation. These wormholes can be embedded as saddle point solutio…
Holographic scattering and non-minimal RT surfaces
Jacqueline Caminiti, Batia Friedman-Shaw, Alex May +2
In the AdS/CFT correspondence, the causal structure of the bulk AdS spacetime is tied to entanglement in the dual CFT. This relationship is captured by the connected wedge theorem,…
An inflationary cosmology from anti-de Sitter wormholes
Panos Betzios, Olga Papadoulaki
We propose a new type of wavefunction for the universe computed from the Euclidean path integral, with asymptotically boundary conditions. In the semiclassical limit, it desc…
Black hole - wormhole transitions in two dimensional string theory
Panos Betzios, Nava Gaddam, Olga Papadoulaki
We study charged black hole and wormhole solutions of Type 0A/IIA string theory in two dimensions. There is a competition between Euclidean wormholes and near extremal black holes…
Wilson Loops and Wormholes
Panos Betzios, Olga Papadoulaki
We analyse the properties of Wilson loop observables for holographic gauge theories, when the dual bulk geometries have a single and/or multiple boundaries (Euclidean spacetime wor…
Microstates of a Black Hole in string theory
Panos Betzios, Olga Papadoulaki
We analyse models of Matrix Quantum Mechanics in the double scaling limit that contain non-singlet states. The finite temperature partition function of such systems contains non-tr…
Baby Universes born from the Void
Panos Betzios, Nava Gaddam, Olga Papadoulaki
We propose a novel construction of a third quantised baby universe Hilbert space for the quantum gravity path integral. In contrast to the original description o…
Recovering information in an asymptotically flat spacetime in quantum gravity
Chandramouli Chowdhury, Olga Papadoulaki
As an extension of arXiv:\{2002.02448, 2008.10740\} we present a physical protocol that a set of observers can use to detect a pure state in the bulk when they are spread across a…
Interacting systems and wormholes
Panos Betzios, Elias Kiritsis, Olga Papadoulaki
We consider a class of tripartite systems for which two -dimensional QFTs are cross-coupled via a third -dimensional "messenger" QFT. We analyse in detail the example of a…
Holography from the Wheeler-DeWitt equation
Chandramouli Chowdhury, Victor Godet, Olga Papadoulaki +1
In a theory of quantum gravity, states can be represented as wavefunctionals that assign an amplitude to a given configuration of matter fields and the metric on a spatial slice. T…
Black Hole S-matrix for a scalar field
Panos Betzios, Nava Gaddam, Olga Papadoulaki
We describe a unitary scattering process, as observed from spatial infinity, of massless scalar particles on an asymptotically flat Schwarzschild black hole background. In order to…
Irreversibility, heat and information flows induced by non-reciprocal interactions
Sarah A. M. Loos, Sabine H. L. Klapp
We study the thermodynamic properties induced by non-reciprocal interactions between stochastic degrees of freedom in time- and space-continuous systems. We show that, under fairly…
Global symmetries, hidden sectors and emergent (dark) vector interactions
Panagiotis Betzios, Elias Kiritsis, Vasilis Niarchos +1
Hidden theories coupled to the SM may provide emergent (dark) vectors, that are composites/bound-states of the hidden fields. This is motivated by paradigms emerging from the AdS/C…
Brane Cosmology and the self-tuning of the cosmological constant in the presence of bulk black holes
Panagiotis Betzios, Olga Papadoulaki
Motivated by the holographic self-tuning proposal of the cosmological constant, we generalize and study the cosmology of brane-worlds embedded in a higher-dimensional bulk black ho…
Black holes, quantum chaos, and the Riemann hypothesis
Panos Betzios, Nava Gaddam, Olga Papadoulaki
Quantum gravity is expected to gauge all global symmetries of effective theories, in the ultraviolet. Inspired by this expectation, we explore the consequences of gauging CPT as a…
Liouville theory and Matrix models: A Wheeler DeWitt perspective
Panagiotis Betzios, Olga Papadoulaki
We analyse the connections between the Wheeler DeWitt approach for two dimensional quantum gravity and holography, focusing mainly in the case of Liouville theory coupled to …
Hunting for fermionic instabilities in charged AdS black holes
Oscar J. C. Dias, Ramon Masachs, Olga Papadoulaki +1
Fermions scattering on a black hole background cannot develop an instability sourced by superradiance. However, in a global (or planar) AdS-Reissner-Nordström background fermio…
Euclidean Wormholes and Holography
Panos Betzios, Elias Kiritsis, Olga Papadoulaki
Asymptotically AdS wormhole solutions are considered in the context of holography. Correlation functions of local operators on distinct boundaries are studied. It is found that suc…