75 citations · 1.3k across the 70 of their papers we have counts for
4 papers · 1 filter
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…
Squeezed gravitons from superradiant axion fields around rotating black holes
Panagiotis Dorlis, Nick E. Mavromatos, Sarben Sarkar +1
We propose, in (3+1)-dimensional spacetimes, a novel astrophysical source of squeezed graviton states, due to superradiant axionic clouds surrounding rotating (Kerr-type) black hol…
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…
Environmental CPT Violation in an Expanding Universe in String Theory
John Ellis, Nick E. Mavromatos, Sarben Sarkar
We consider a model of an expanding Universe in string theory that yields `environmental' CPT violation for fermions, in the sense of different dispersion relations for fermions an…