Zobrazeno 1 - 10
of 5 315
pro vyhledávání: '"PAPANIKOLAOU, P."'
Considering inflationary magnetogenesis induced by time-dependent kinetic and axial couplings of a massless Abelian vector boson field breaking the conformal invariance we show in this Letter that, surprisingly, the spectral shape of the primordial m
Externí odkaz:
http://arxiv.org/abs/2412.10367
Autor:
Bozanis, Dimitrios, Tyrovolas, Dimitrios, Papanikolaou, Vasilis K., Tegos, Sotiris A., Diamantoulakis, Panagiotis D., Liaskos, Christos K., Schober, Robert, Karagiannidis, George K.
As 6G wireless networks seek to enable robust and dynamic programmable wireless environments (PWEs), reconfigurable intelligent surfaces (RISs) have emerged as a cornerstone for controlling electromagnetic wave propagation. However, realizing the pot
Externí odkaz:
http://arxiv.org/abs/2412.04989
Autor:
Tzerefos, Charalampos, Papanikolaou, Theodoros, Basilakos, Spyros, Saridakis, Emmanuel N., Mavromatos, Nick E.
Within the context of a Chern-Simons running-vacuum-model (RVM) cosmology, one expects an early-matter dominated (eMD) reheating period after RVM inflation driven by the axion field. Treating thus in this work Chern-Simons RVM cosmology as an effecti
Externí odkaz:
http://arxiv.org/abs/2411.14223
Autor:
He, Xin-Chen, Cai, Yi-Fu, Ma, Xiao-Han, Papanikolaou, Theodoros, Saridakis, Emmanuel N., Sasaki, Misao
Ultra-light primordial black holes (PBHs) with masses $M_{\rm PBH}<5\times 10^8\mathrm{g}$ can dominate transiently the energy budget of the Universe and reheat the Universe through their evaporation taking place before Big Bang Nucleosynthesis. The
Externí odkaz:
http://arxiv.org/abs/2409.11333
Gravitational waves (GWs) can undoubtedly serve as a messenger from the early Universe acting as well as a novel probe of the underlying gravity theory. In this work, motivated by one-loop vacuum-polarization effects on curved spacetime, we investiga
Externí odkaz:
http://arxiv.org/abs/2408.17259
Autor:
Basilakos, Spyros, Nanopoulos, Dimitri V., Papanikolaou, Theodoros, Saridakis, Emmanuel N., Tzerefos, Charalampos
In light of NANOGrav data we provide for the first time possible observational signatures of Superstring theory. Firstly, we work with inflection-point inflationary potentials naturally realised within Wess-Zumino type no-scale Supergravity, which gi
Externí odkaz:
http://arxiv.org/abs/2409.02936
Autor:
Angeletti, Andrea, Leoni, Luca, Massa, Dario, Pasquini, Luca, Papanikolaou, Stefanos, Franchini, Cesare
Understanding and accurately predicting hydrogen diffusion in materials is challenging due to the complex interactions between hydrogen defects and the crystal lattice. These interactions span large length and time scales, making them difficult to ad
Externí odkaz:
http://arxiv.org/abs/2407.21088
Gate-level clocking, typical in traditional approaches to Single Flux Quantum (SFQ) technology, makes the effective synthesis of superconducting circuits a significant engineering hurdle. This paper addresses this challenge by employing the recently
Externí odkaz:
http://arxiv.org/abs/2407.20942
Autor:
Mrazek, Vojtech, Kokkinis, Argyris, Papanikolaou, Panagiotis, Vasicek, Zdenek, Siozios, Kostas, Tzimpragos, Georgios, Tahoori, Mehdi, Zervakis, Georgios
Printed electronics offer ultra-low manufacturing costs and the potential for on-demand fabrication of flexible hardware. However, significant intrinsic constraints stemming from their large feature sizes and low integration density pose design chall
Externí odkaz:
http://arxiv.org/abs/2407.20589
Autor:
Kaszuba, Grzegorz, Naghdi, Amirhossein D., Massa, Dario, Papanikolaou, Stefanos, Jaszkiewicz, Andrzej, Sankowski, Piotr
Large language models manifest the ability of few-shot adaptation to a sequence of provided examples. This behavior, known as in-context learning, allows for performing nontrivial machine learning tasks during inference only. In this work, we address
Externí odkaz:
http://arxiv.org/abs/2406.01808