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- European Organization for Nuclear ResearchCH78 papers
- Foundation for Research and Technology HellasGR60 papers
- Aristotle University of ThessalonikiGR51 papers
- National Technical University of AthensGR47 papers
- National Centre of Scientific Research "Demokritos"GR45 papers
- Centre National de la Recherche ScientifiqueFR43 papers
- Computer Technology Institute and Press “DIOPHANTUS”GR41 papers
- National Observatory of AthensGR40 papers
- Institute for Nuclear ResearchRU32 papers
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52 papers · 1 filter
Primordial black hole dark matter from ultra-slow-roll inflation in Horndeski gravity
Despina Totolou, Theodoros Papanikolaou, Emmanuel N. Saridakis
Primordial black holes (PBHs) provide a well-motivated non-particle candidate for dark matter, requiring an enhancement of curvature perturbations on small inflationary scales cons…
Theoretical filters for shift-symmetric Horndeski gravities
Athanasios Bakopoulos, Christos Charmousis, Nikos Chatzifotis +1
We investigate the structure of nontrivial maximally symmetric vacua and compact-object solutions in shift-symmetric scalar-tensor theories. Focusing on Horndeski gravity, we deriv…
Resonant excitation of eccentricity in spherical extreme-mass-ratio inspirals
Areti Eleni, Kyriakos Destounis, Theocharis A. Apostolatos +1
Gravitational radiation reaction, has been one of the fundamental issues in general relativity. Over a span of decades, this process has been analyzed in the adiabatic limit, in or…
Gravity-mediated decoherence
Dimitris Moustos, Charis Anastopoulos
A small quantum system within the gravitational field of a massive body will be entangled with the quantum degrees of freedom of the latter. Hence, the massive body acts as an envi…
Black holes with primary scalar hair
Athanasios Bakopoulos, Christos Charmousis, Panagiota Kanti +2
We present explicit black holes endowed with primary scalar hair within the shift-symmetric subclass of Beyond Horndeski theories. These solutions depend, in addition to the conven…
Entanglement in Cosmology
Konstantinos Boutivas, Dimitrios Katsinis, Georgios Pastras +1
We compute the evolution of the entanglement entropy for a massless field within a spherical region throughout the inflationary period and the subsequent era of radiation dominatio…