31 citations · 45 across the 9 of their papers we have counts for
10 papers
How Much Can Gravitons Be Squeezed?
Panagiotis Dorlis, Nick E. Mavromatos, Sarben Sarkar +1
Quantum Gravity remains elusive, largely because its observable effects are suppressed by powers of the Planck scale. Direct detection of single gravitons is widely believed to be…
Axions, Black Holes and the Detection of Gravitons: from Astrophysics to Cosmology
Nick E. Mavromatos, Panagiotis Dorlis, Sarben Sarkar +1
We review a novel scenario for the emergence of spin-polarisation entangled squeezed graviton states from superradiant axionic clouds in the neighborhood of astrophysical rotating…
Dynamical-System analysis of single-axion monodromy inflation with periodically-modulated potentials
Panagiotis Dorlis, Nick E. Mavromatos, Sotirios-Neilos Vlachos +1
In this work, we study field theoretic systems of a single axion-like field with linear potentials modulated by cosine terms, allegedly induced by non-perturbative instanton config…
Superradiant Axionic Black-Hole Clouds as Seeds for Graviton Squeezing
Panagiotis Dorlis, Nick E. Mavromatos, Sarben Sarkar +1
It is shown that both, standard general relativity (GR) and Chern-Simons (CS) gravity, the latter containing chiral gravitational anomaly terms, seed the production of pairs of ent…
Inflation from Anomalies
Nick E. Mavromatos, Panagiotis Dorlis, Sotirios-Neilos Vlachos
We review a string-inspired model of inflation which is a consequence of condensates of chiral gravitational waves (GW) in the primordial Universe, leading in turn to a (approximat…
Quantum-Ordering Ambiguities in Weak Chern-Simons 4D Gravity and Metastability of the Condensate-Induced Inflation
Panagiotis Dorlis, Nick E. Mavromatos, Sotirios-Neilos Vlachos
In this work, we elaborate further on a 4D cosmological Running-Vacuum-type Model (RVM) of inflation that characterises string-inspired Chern-Simons (CS) gravity. It has been shown…
Torsion-induced axions in string theory, quantum gravity and the cosmological tensions
Nick E. Mavromatos, Panagiotis Dorlis, Sotirios-Neilos Vlachos
We discuss the role of torsion in string theory on inducing pseudoscalar degrees of freedom (axions), which in turn couple to (gravitational) Chern-Simons (CS) anomalous terms. Suc…
Condensate-Induced Inflation from Primordial Gravitational Waves in String-Inspired Chern-Simons Gravity
Panagiotis Dorlis, Nick E. Mavromatos, Sotirios-Neilos Vlachos
In this work, we elaborate further on a cosmological model of inflation that characterises Chern-Simons (CS) gravity models inspired from string theory. Such models are known to be…
Bypassing Bekenstein's no-scalar-hair theorem without violating the energy conditions
Panagiotis Dorlis, Nick E. Mavromatos, Sotirios-Neilos Vlachos
In this work we establish in a rigorous manner, and a model independent way, the conditions for bypassing Bekenstein's no-scalar-hair theorem for static, spherically symmetric, and…
On Thermal Stability of Hairy Black Holes
Nikos Chatzifotis, Panagiotis Dorlis, Nick E. Mavromatos +1
We discuss thermodynamical stability for hairy black hole spacetimes, viewed as defects in the thermodynamical parameter space, taking into account the backreaction of a secondary…