540 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- A. Paliathanasis2 profiles185 · h 42
- G. Leon2 profiles55 · h 31
- M. Govender2 profiles30 · h 21
- M. Znojil2 profiles27 · h 34
- K. G. Zloshchastiev26 · h 18
- P. Leach4 profiles22 · h 15
- S. Pan22 · h 46
- Supriya Pan3 profiles21 · h 14
- Weiqiang Yang2 profiles21 · h 42
- N. Dimakis2 profiles19 · h 21
- A. Giacomini2 profiles13 · h 19
- E. di Valentino10 · h 2
- Austral University of ChileCL111 papers
- Universidad Católica del NorteCL85 papers
- Presidency UniversityIN34 papers
- University of KwaZulu-NatalZA34 papers
- National and Kapodistrian University of AthensGR26 papers
- University of Hradec KrálovéCZ25 papers
- Czech Academy of Sciences, Nuclear Physics InstituteCZ24 papers
- Liaoning Normal UniversityCN22 papers
- National Institute for Theoretical PhysicsZA22 papers
- University of SheffieldGB16 papers
- National Observatory of AthensGR14 papers
- North-West UniversityZA14 papers
21 papers · 1 filter
Clusterization of weakly-interacting bosons in one dimension: an analytic study at zero temperature
S. Prestipino, A. Sergi, E. Bruno
We study a system of penetrable bosons on a line, focusing on the high-density/weak-interaction regime, where the ground state is, to a good approximation, a condensate. Under comp…
Reconstructing the dark matter and dark energy interaction scenarios from observations
Weiqiang Yang, Narayan Banerjee, Andronikos Paliathanasis +1
We consider a class of interacting dark energy models in a flat and nonflat FLRW universe where the interaction is characterized by the modified evolution of the pressureless dark…
Stability of a modified Jordan-Brans-Dicke theory in the dilatonic frame
Genly Leon, Andronikos Paliathanasis, Luisberis Velazquez Abad
We investigate the Jordan-Brans-Dicke action in the cosmological scenario of FLRW spacetime with zero spatially curvature and with an extra scalar field minimally coupled to gravit…
Reduced Lagrangians and analytic solutions in Einstein-æther Cosmology
M. Roumeliotis, A. Paliathanasis, Petros A. Terzis +1
We present the solution space of the field equations in the Einstein-æther theory for the case of a and a LRS Bianchi Type space-time. We also find that there are port…
Exact Solutions in Chiral Cosmology
Andronikos Paliathanasis, Genly Leon, Supriya Pan
In multi-scalar field cosmologies new dynamical degrees of freedom are introduced which can explain the observational phenomena. Unlike the usual scalar field theory where a single…
Noise Sensitivity of Local Descriptors vs ConvNets: An application to Facial Recognition
Yasin Musa Ayami, Aboubayda Shabat, Delene Heukelman
The Local Binary Patterns (LBP) is a local descriptor proposed by Ojala et al to discriminate texture due to its discriminative power. However, the LBP is sensitive to noise and il…
Quasi-Lie Brackets and the Breaking of Time-Translation Symmetry for Quantum Systems Embedded in Classical Baths
Alessandro Sergi, Gabriel Hanna, Roberto Grimaudo +1
Many open quantum systems encountered in both natural and synthetic situations are embedded in classical-like baths. Often, the bath degrees of freedom may be represented in terms…
Szekeres Universes with Homogeneous Scalar Fields
John D. Barrow, Andronikos Paliathanasis
We consider the existence of an "inflaton" described by an homogeneous scalar field in the Szekeres cosmological metric. The gravitational field equations are reduced to two famili…
The past and future dynamics of quintom dark energy models
Genly Leon, Andronikos Paliathanasis, Jorge Luis Morales-Martínez
We study the phase space of the quintom cosmologies for a class of exponential potentials. We combine normal forms expansions and the center manifold theory in order to describe th…
Freezing of soft-core bosons at zero temperature: A variational theory
Santi Prestipino, Alessandro Sergi, Ezio Bruno
The properties of a macroscopic assembly of weakly-repulsive bosons at zero temperature are well described by Gross-Pitaevskii mean-field theory. According to this formalism the sy…
Symmetries of spacetimes embedded with an Electromagnetic String Fluid
Michael Tsamparlis, Antonios Mitsopoulos, Andronikos Paliathanasis
The electromagnetic string fluid (EMSF) is an anisotropic charged string fluid interacting with a strong magnetic field. In this fluid we consider the double congruence defined by…
Quadratic conservation laws and collineations: a discussion
Leonidas Karpathopoulos, Michael Tsamparlis, Andronikos Paliathanasis
Every second order system of autonomous differential equations can be described by an autonomous holonomic dynamical system with a Lagrangian part, an effective potential and a set…
The generic model of General Relativity
Michael Tsamparlis, Andronikos Paliathanasis
We develop a generic spacetime model in General Relativity which can be used to build any gravitational model within General Relativity. The generic model uses two types of assumpt…
Stability and metastability of trapless Bose-Einstein condensates and quantum liquids
Konstantin G. Zloshchastiev
Various kinds of Bose-Einstein condensates are considered, which evolve without any geometric constraints or external trap potentials including gravitational. For studies of their…
Black branes in four-dimensional conformal equivalent theories
N. Dimakis, Alex Giacomini, Andronikos Paliathanasis
The physical properties of static analytic solutions which describe black brane geometries are discussed. In particular we study the similarities and differences of analytic black…
Dynamical analysis and cosmological viability of varying and cosmology
Andronikos Paliathanasis
The cosmological viability of varying and cosmology is discussed by determining the cosmological eras provided by the theory. Such a study i…
Sustainability of environment-assisted energy transfer in quantum photobiological complexes
Konstantin G. Zloshchastiev
It is shown that quantum sustainability is a universal phenomenon which emerges during environment-assisted electronic excitation energy transfer (EET) in photobiological complexes…
Cosmological constraints on an exponential interaction in the dark sector
Weiqiang Yang, Supriya Pan, Andronikos Paliathanasis
Cosmological models where dark matter (DM) and dark energy (DE) interact with each other are the general scenarios in compared to the non-interacting models. The interaction is usu…
Cosmological singularities and analytical solutions in varying vacuum cosmologies
S. Basilakos, A. Paliathanasis, J. D. Barrow +1
We investigate the dynamical features of a large family of running vacuum cosmologies for which evolves as a polynomial in the Hubble parameter. Specifically, using the critica…
New integrable models and analytical solutions in ~cosmology with an ideal gas
G. Papagiannopoulos, Spyros Basilakos, John D. Barrow +1
In the context of -gravity with a spatially flat FLRW metric containing an ideal fluid, we use the method of invariant transformations to specify families of mod…
Quantization of the Szekeres System
A. Paliathanasis, Adamantia Zampeli, T. Christodoulakis +1
We study the quantum corrections on the Szekeres system in the context of canonical quantization in the presence of symmetries. We start from an effective point-like Lagrangian wit…