30 citations · 93 across the 13 of their papers we have counts for
13 papers
Constraints on Stable Scalar-Tensor Dark Energy from DESI Data and Solar System Tests
Husam Adam, Mark P. Hertzberg, Daniel Jiménez-Aguilar
We investigate the viability of scalar-tensor (quintessence) models of dark energy with a quartic polynomial nonminimal coupling to gravity and a linear scalar potential. The polyn…
Cuspidal Singularities in Collapsing Domain Walls
Jose J. Blanco-Pillado, Matthew Elley, Francesc Ferrer +4
Domain wall networks have attracted renewed interest, particularly in relation to the dynamics of network collapse. Accurately describing this process is challenging and typically…
Accelerated expansion of the universe purely driven by scalar field fluctuations
Daniel Jiménez-Aguilar
We show that scalar field fluctuations alone can drive cosmic acceleration, provided the universe is spatially closed and the Compton wavelength of the field exceeds the radius of…
Comparing Minimal and Non-Minimal Quintessence Models to 2025 DESI Data
Husam Adam, Mark P. Hertzberg, Daniel Jiménez-Aguilar +1
In this work we examine the 2025 DESI analysis of dark energy, which suggests that dark energy is evolving in time with an increasing equation of state . We explore a wide range…
From Cusps to Swallowtails: Domain Wall singularities in 2+1 dimensions
Jose J. Blanco-Pillado, Daniel Jiménez-Aguilar, Oriol Pujolàs
The effective Nambu-Goto description of -dimensional domain walls predicts singular behavior of its worldsheet resulting in swallowtail bifurcations. This phenomenon is inti…
Probability of the Initial Conditions for Inflation and Slow Contraction
Mark P. Hertzberg, Daniel Jiménez-Aguilar
Some recent studies based on numerical relativity simulations claim that slow contraction/ekpyrosis is strongly preferred over inflation as the smoothing mechanism that brought the…
Effective Actions for Domain Wall Dynamics
Jose J. Blanco-Pillado, Alberto García Martín-Caro, Daniel Jiménez-Aguilar +1
We introduce a systematic method to derive the effective action for domain walls directly from the scalar field theory that gives rise to their solitonic solutions. The effective a…
Nambu-Goto Dynamics of Field Theory Cosmic String Loops
Jose J. Blanco-Pillado, Daniel Jiménez-Aguilar, Joanes Lizarraga +4
We perform a detailed comparison of the dynamics of cosmic string loops obtained in cosmological field theory simulations with their expected motion according to the Nambu-Goto act…
Parametric Resonances in Axionic Cosmic Strings
Jose J. Blanco-Pillado, Daniel Jiménez-Aguilar, Jose M. Queiruga +1
In this letter we uncover a new parametric resonance of axionic cosmic strings. This process is triggered by the presence on the string of internal mode excitations that resonantly…
A unified model of inflation and dark energy based on the holographic spacetime foam
Daniel Jiménez-Aguilar
I present a model of inflation and dark energy in which the inflaton potential is constructed by imposing that a scalar field representing the classical energy of the spacetime foa…
The dynamics of Domain Wall Strings
Jose J. Blanco-Pillado, Daniel Jiménez-Aguilar, Jose M. Queiruga +1
We study the dynamics of domain wall solitons in field theories. These objects are extended along one of the spatial directions, so they also behave as strings; hence the…
Internal Excitations of Global Vortices
Jose J. Blanco-Pillado, Daniel Jiménez-Aguilar, Jose M. Queiruga +1
We investigate the spectrum of linearized excitations of global vortices in dimensions. After identifying the existence of localized excitation modes, we compute the decay ti…
Exciting the Domain Wall Soliton
Jose J. Blanco-Pillado, Daniel Jiménez-Aguilar, Jon Urrestilla
Many solitonic configurations in field theory have localized bound states in their spectrum of linear perturbations. This opens up the possibility of having long lived excitations…