255 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Frankfurt Institute for Advanced StudiesDE17 papers
- Ben-Gurion University of the NegevIL16 papers
- University of CambridgeGB5 papers
- Bulgarian Academy of SciencesBG2 papers
- Haldia Institute of TechnologyIN2 papers
- Hawaii Pacific UniversityUS2 papers
- Institute for Nuclear Research and Nuclear EnergyBG2 papers
- Queen Mary University of LondonGB2 papers
- Sister Nivedita UniversityIN2 papers
- The Abdus Salam International Centre for Theoretical Physics (ICTP)IT2 papers
- Universitat Politècnica de CatalunyaES2 papers
- University of CalcuttaIN2 papers
29 papers
Observational Insights on DBI K-essence Models Using Machine Learning and Bayesian Analysis
Samit Ganguly, Arijit Panda, Eduardo Guendelman +3
We perform a late-time cosmological study; we compare the performance of two Dirac-Born-Infeld (DBI)-type k-essence scalar field extensions of the CDM model to the standard fram…
Non-Affine Extensions of the Raychaudhuri Equation in the K-essence Framework
Samit Ganguly, Goutam Manna, Debashis Gangopadhyay +2
We present a new avenue of the Raychaudhuri Equation (RE) by introducing a non-affine parametrization within the k-essence framework. This modification accounts for non-geodesic fl…
Strong Lensing by Galaxy Clusters
Priyamvada Natarajan, Liliya L. Williams, Marusa Bradac +4
Galaxy clusters as gravitational lenses play a unique role in astrophysics and cosmology: they permit mapping the dark matter distribution on a range of scales; they reveal the pro…
Dark Energy as a Critical Period in Binary Motion: Bounds from Multi-scale Binaries
David Benisty, Jenny Wagner, Denitsa Staicova
The two-body problem under the influence of both dark energy and post-Newtonian modifications is studied. In this unified framework, we demonstrate that dark energy plays the role…
Much ado about no offset -- Characterising the anomalous multiple-image configuration and the model-driven displacement between light and mass in the multi-plane strong lens Abell 3827
Joyce Lin, Jenny Wagner, Richard E. Griffiths
Abell 3827 is a unique galaxy cluster with a dry merger in its core causing a highly-resolved multiple-image configuration of a blue spiral galaxy at . The surfa…
Is the Observable Universe Consistent with the Cosmological Principle?
Pavan Kumar Aluri, Paolo Cea, Pravabati Chingangbam +20
The Cosmological Principle (CP) -- the notion that the Universe is spatially isotropic and homogeneous on large scales -- underlies a century of progress in cosmology. It is conven…
Relieving String Tension By Making Baby Universes in a Dynamical String Tension Braneworld Model
Eduardo I. Guendelman, Zeeya Merali
String tension fundamentally determines the properties of strings; yet its value is often assigned arbitrarily, creating a fine-tuning problem. We describe a mechanism for dynamica…
Solving the Hubble tension à la Ellis & Stoeger 1987
Jenny Wagner
The discrepancy between the value of the Hubble constant in the late, local universe and the one obtained from the Planck collaboration representing an all-sky value for the…
Brane world creation from flat or almost flat space in dynamical tension string theories
E. I. Guendelman, J. Portnoy
There is great interest in the construction of brane worlds, where matter and gravity are forced to be effective only in a lower dimensional surface , the brane . How these could a…
Unifying Inflation with early and late Dark Energy in Multi-Fields: Spontaneously broken scale invariant TMT
Eduardo Guendelman, Ramon Herrera, David Benisty
A unified multi scalar field model with three flat regions is discussed. The three flat regions are the inflation, early and late dark energy epochs. The potential is obtained by a…
Implications of the Spectrum of Dynamically Generated String Tension Theories
E. I. Guendelman
The string tension does not have to be put in by hand, it can be dynamically generated, as in the case when we formulate string theory in the modified measure formalism, and other…
The dark side of the torsion: Dark Energy from propagating torsion
David Benisty, Eduardo I. Guendelman, Armin van de Venn +3
An extension to the Einstein-Cartan (EC) action is discussed in terms of cosmological solutions. The torsion incorporated in the EC Lagrangian is assumed to be totally anti-symmetr…
Light Like Segment Compactification and Braneworlds with Dynamical String Tension
Eduardo Guendelman
Braneworld scenarios appear in dynamical string tension theories, where string tension is positive between two surfaces separated by a short distance and at the two surfaces themse…
Unified Dark Energy and Dark Matter from Dynamical Spacetime Cosmology
David Benisty
A model of unified dark matter and dark energy based on a Dynamical Spacetime Theory (DST) is studied. By introducing a Dynamical Spacetime vector field , a conservation of an…
attractors in Quintessential Inflation motivated by Supergravity
Llibert Aresté Saló, David Benisty, Eduardo I. Guendelman +1
An exponential kind of quintessential inflation potential motivated by supergravity is studied. This type belongs to the class of α-attractor models. The model was studied for the…
Quintessential inflation and cosmological seesaw Mechanism: reheating and observational constraints
Llibert Aresté Saló, David Benisty, Eduardo I. Guendelman +1
Recently a new kind of quintessential inflation coming from the Lorentzian distribution has been introduced in [1,2]. The model leads to a very simple potential, which basically de…
Noether Symmetry in Newtonian Dynamics and Cosmology
E. I. Guendelman, E. Zamlung, D. Benisty
A new symmetry for Newtonian Dynamics is analyzed, this corresponds to going to an accelerated frame, which introduces a constant gravitational field into the system and subsequent…
The Local Group as a test system for Modified Newtonian Dynamics
David Benisty, Eduardo I. Guendelman
The Local Group (LG) is {an appropriate} test system for Modified Newtonian Dynamics, since the acceleration of M31 galaxy is fully in the deep MOND regime . We model th…
Quintessential Inflation from Lorentzian Slow Roll
David Benisty, Eduardo I. Guendelman
From the assumption that the slow roll parameter has a Lorentzian form as a function of the e-folds number , a successful model of a quintessential inflation is obtained, as…
Quintessential Inflation with Dynamical Higgs Generation as an Affine Gravity
David Benisty, Eduardo Guendelman, Emil Nissimov +1
First, we propose a scale-invariant modified gravity interacting with a neutral scalar "inflaton" and a Higgs-like SU(2)xU(1) iso-doublet scalar field based on the formalism of non…
Homotopy analysis method applied to second-order frequency mixing in nonlinear optical dielectric media
Nathan J. Dawson, Moussa Kounta
The classical problem of three-wave mixing in a nonlinear optical medium is investigated using the homotopy analysis method (HAM). We show that the power series basis builds a gene…
Dark energy and dark matter unification from dynamical space time: observational constraints and cosmological implications
Fotios K. Anagnostopoulos, David Benisty, Spyros Basilakos +1
A recently proposed Dynamical Space-time Cosmology (DSC) that unifies dark energy and dark matter is studied. The general action of this scenario includes a Lagrange multiplier, wh…
Verlinde formulae on complex surfaces: K-theoretic invariants
L. Göttsche, M. Kool, R. A. Williams
We conjecture a Verlinde type formula for the moduli space of Higgs sheaves on a surface with a holomorphic 2-form. The conjecture specializes to a Verlinde formula for the moduli…
The second hyperpolarizability of systems described by the space-fractional Schrodinger equation
Nathan J. Dawson, Onassis Nottage, Moussa Kounta
The static second hyperpolarizability is derived from the space-fractional Schrödinger equation in the particle-centric view. The Thomas-Reiche-Kuhn sum rule matrix elements and th…