10.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- European Organization for Nuclear ResearchCH2k papers
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- Charles UniversityCZ1.9k papers
- Rutherford Appleton LaboratoryGB1.9k papers
- Centre National de la Recherche ScientifiqueFR1.8k papers
- Universidad Autónoma de MadridES1.8k papers
- Boğaziçi UniversityTR1.8k papers
- University of BelgradeRS1.8k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT1.8k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.8k papers
- The Ohio State UniversityUS1.8k papers
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41 papers · 1 filter
Hawking Radiation via Gravitational Anomalies in Non-spherical Topologies
Eleftherios Papantonopoulos, Petros Skamagoulis
We study the method of calculating the Hawking radiation via gravitational anomalies in gravitational backgrounds of constant negative curvature. We apply the method to topological…
Isotope effect on the E2g phonon and mesoscopic phase separation near the electronic topological transition in Mg1-xAlxB2
L. Simonelli, V. Palmisano, M. Fratini +5
We report the boron isotope effect on the E2g phonon mode by micro-Raman spectroscopy on the ternary Mg1-xAlxB2 system, synthesized with pure isotopes 10B and 11B. The isotope coef…
Reducing the Heterotic Supergravity on nearly-Kahler coset spaces
A. Chatzistavrakidis, P. Manousselis, G. Zoupanos
We study the dimensional reduction of the , ten-dimensional Heterotic Supergravity to four dimensions, at leading order in , when the internal space is a nearly-Käh…
Interlaced linear-nonlinear optical waveguide arrays
Kyriakos Hizanidis, Yannis Kominis, Nikolaos K. Efremidis
The system of coupled discrete equations describing a two-component superlattice with interlaced linear and nonlinear constituents is revisited as a basis for investigating binary…
Spatiotemporal interaction of optical beams in bi-dispersive media
Nikolaos Moshonas, Yannis Kominis, Panagiotis Papagiannis +2
The interaction of optical beams in bi-dispersive nonlinear media with self-focusing nonlinearity is numerically investigated. Under proper conditions, the interaction of spatially…
Reflection, Transmission and Trapping Dynamics of Lattice Solitons at Interfaces
Yannis Kominis, Kyriakos Hizanidis
Surface soliton formation and lattice soliton dynamics at an interface between two inhomogeneous periodic media are studied in terms of an effective particle approach. The global r…
The General Very Special Relativity in Finsler Cosmology
A. P. Kouretsis, M. Stathakopoulos, P. C. Stavrinos
General Very Special Relativity (GVSR) is the curved space-time of Very Special Relativity (VSR) proposed by Cohen and Glashow. The geometry of GVSR possesses a line element of Fin…
Measurement of Diffractive Scattering of Photons with Large Momentum Transfer at HERA
H1 Collaboration
The first measurement of diffractive scattering of quasi-real photons with large momentum transfer gamma p -> gamma Y, where Y is the proton dissociative system, is made using the…
Black Holes and Black String-like Solutions in Codimension-2 Braneworlds
Eleftherios Papantonopoulos
We discuss black hole solutions with a Gauss-Bonnet term in the bulk and an induced gravity term on a thin brane of codimension-2. We show that these black holes can be localized o…
Selecting Finite Unified Theories with Current Data
S. Heinemeyer, M. Mondragon, G. Zoupanos
Finite Unified Theories (FUTs) are N=1 supersymmetric Grand Unified Theories that can be made all-loop finite, leading to a severe reduction of the free parameters. We review the i…
Shear Viscosity and Chern-Simons Diffusion Rate from Hyperbolic Horizons
George Koutsoumbas, Eleftherios Papantonopoulos, George Siopsis
We calculate the shear viscosity and anomalous baryon number violation rate in quantum field theories at finite temperature having gravity duals with hyperbolic horizons. We find t…
Thermo-Poro-Mechanical Properties of Clayey Gouge and Application to Rapid Fault Shearing
Jean Sulem, Paul Lazar, Ioannis Vardoulakis
In this paper, the mechanism of fault pressurization in rapid slip events is analyzed on the basis of a complete characterization of the thermo-poro-mechanical behavior of a clayey…
Coset Space Dimensional Reduction and Wilson Flux Breaking of Ten-Dimensional N=1, E(8) Gauge Theory
George Douzas, Theodoros Grammatikopoulos, George Zoupanos
We consider a N=1 supersymmetric E(8) gauge theory, defined in ten dimensions and we determine all four-dimensional gauge theories resulting from the generalized dimensional reduct…
Finite temperature and confinement along the extra dimensions studied on a five-dimensional U(1) lattice gauge model
K. Farakos, S. Vrentzos
In this paper we study the properties of the phase diagram of a simple extra dimensional model on the lattice at finite temperature. We consider the five-dimensional pure gauge abe…
Bulk photons in Asymmetrically Warped Space-times and Non-trivial Vacuum Refractive Index
K. Farakos, N. E. Mavromatos, P. Pasipoularides
We consider asymmetrically warped brane models, or equivalently brane models where the background metric is characterized by different time and space warp factors. The main feature…
Shaken, but not stirred - Potts model coupled to quantum gravity
J. Ambjorn, K. N. Anagnostopoulos, R. Loll +1
We investigate the critical behaviour of both matter and geometry of the three-state Potts model coupled to two-dimensional Lorentzian quantum gravity in the framework of causal dy…
Factorizations of EP operators
Dimosthenis Drivaliaris, Sotirios Karanasios, Dimitrios Pappas
In this paper we characterize EP operators through the existence of different types of factorizations. Our results extend to EP operators existing characterizations for EP matrices…
Telex: Principled System Support for Write-Sharing in Collaborative Applications
Lamia Benmouffok, Jean-Michel Busca, Joan Manuel Marquès +3
The Telex system is designed for sharing mutable data in a distributed environment, particularly for collaborative applications. Users operate on their local, persistent replica of…
Measurement of the Proton Structure Function F_L at Low x
H1 Collaboration
A first measurement is reported of the longitudinal proton structure function F_L(x,Q^2) at the ep collider HERA. It is based on inclusive deep inelastic e^+p scattering cross sect…
Voltage Dependence of Spin Transfer Torque in Magnetic Tunnel Junctions
M. Chshiev, I. Theodonis, A. Kalitsov +2
Theoretical investigations of spin transfer torque in magnetic tunnel junctions using the tight-binding model in the framework of non-equilibrium Green functions formalism are pres…
Discontinuities in Scalar Perturbations of Topological Black Holes
George Koutsoumbas, Eleftherios Papantonopoulos, George Siopsis
We study the perturbative behaviour of topological black holes. We calculate both analytically and numerically the quasi-normal modes of scalar perturbations. In the case of small…
Hilbert space structure and positive operators
D. Drivaliaris, N. Yannakakis
Let X be a real Banach space. We prove that the existence of an injective, positive, symmetric and not strictly singular operator from X into its dual implies that either X admits…
Generalizations of the Lax-Milgram theorem
D. Drivaliaris, N. Yannakakis
We prove a linear and a nonlinear generalization of the Lax-Milgram theorem. In particular we give sufficient conditions for a real-valued function defined on the product of a refl…
Subspaces with a common complement in a Banach space
D. Drivaliaris, N. Yannakakis
We study the problem of the existence of a common algebraic complement for a pair of closed subspaces of a Banach space. We prove the following two characterizations: (1) The pairs…