65 citations · 206 across the 10 of their papers we have counts for
8 papers · 1 filter
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…
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 …
Fluctuations in non-conformal holographic plasma at criticality
Panagiotis Betzios, Umut Gürsoy, Matti Järvinen +1
We continue the study initiated in [arXiv:1708.02252] of the fluctuations of a strongly-coupled non-conformal plasma described holographically by Einstein gravity coupled to a dila…
Antipodal correlation on the meron wormhole and a bang-crunch universe
Panagiotis Betzios, Nava Gaddam, Olga Papadoulaki
We present a covariant euclidean wormhole solution to Einstein Yang-Mills system and study scalar perturbations analytically. The fluctuation operator has a positive definite spect…
Quasi-normal modes of a strongly coupled non-conformal plasma and approach to criticality
Panagiotis Betzios, Umut Gürsoy, Matti Järvinen +1
We study fluctuations around equilibrium in a class of strongly interacting non-conformal plasmas using holographic techniques. In particular we calculate the quasi-normal mode spe…
Matrix Quantum Mechanics on
Panagiotis Betzios, Umut Gürsoy, Olga Papadoulaki
We study Matrix Quantum Mechanics on the Euclidean time orbifold . Upon Wick rotation to Lorentzian time and taking the double-scaling limit this theory provides…
The Black Hole S-Matrix from Quantum Mechanics
Panagiotis Betzios, Nava Gaddam, Olga Papadoulaki
We revisit the old black hole S-Matrix construction and its new partial wave expansion of 't Hooft. Inspired by old ideas from non-critical string theory & Matrix Quantum Mec…
Electromagnetic response of interacting Weyl semimetals
V. P. J. Jacobs, Panagiotis Betzios, Umut Gursoy +1
We study the electromagnetic properties of Weyl semimetals with strong interactions. Focusing on a single Weyl cone in the band structure, we induce strong interactions by coupling…