359 citations · 1.4k across the 27 of their papers we have counts for
28 papers
The axion mass in the post-inflationary scenario in a minimal scaling model
José Correia, Mark Hindmarsh, Joanes Lizarraga +3
We calculate the dark matter axion mass in the post-inflationary scenario in a minimal model with a set of classical field theory simulations on grids. In the model, th…
The art of simulating the early Universe. Part II. Non-canonical cases & gravitational waves
Jorge Baeza-Ballesteros, Daniel G. Figueroa, Adrien Florio +7
We present a discussion on lattice techniques for the simulation of non-canonical field theory circumstances, complementing our previous monograph (arXiv:2006.15122) on canonical c…
The spectrum of axions in a scaling string network
José Correia, Mark Hindmarsh, Joanes Lizarraga +3
We report on measurements of axion spectra and their unequal time correlators in simulations on fixed-grids, the largest such measurements to date. We use a novel combina…
Kinetic Fragmentation of the QCD Axion on the Lattice
Matteo Fasiello, Joanes Lizarraga, Alexandros Papageorgiou +1
Kinetic misalignment, one of the most compelling scenarios for the non-thermal generation of axion dark matter, is generally accompanied by axion fragmentation, a process in which…
Comparative study of the strong backreaction regime in axion inflation: the effect of the potential
Joanes Lizarraga, Carmelo López-Mediavilla, Ander Urio
Recent works have demonstrated the necessity of capturing the local inhomogeneous physics in axion inflation, and showed new genuine features, most notably the extension of the inf…
The non-linear dynamics of axion inflation: a detailed lattice study
Daniel G. Figueroa, Joanes Lizarraga, Nicolás Loayza +2
We study in detail the fully inhomogeneous non-linear dynamics of axion inflation, identifying three regimes: weak-, mild-, and strong-backreaction, depending on the duration of in…
Scaling density of axion strings in terasite simulations
José Correia, Mark Hindmarsh, Joanes Lizarraga +3
We report on a study of axion string networks using fixed-grid simulations of up to points per side. The length of string can be characterised in terms of standard dimensio…
Gravitational wave and particle emission from a cosmic string loop: local case
Jorge Baeza-Ballesteros, Edmund J. Copeland, Daniel G. Figueroa +1
Using lattice field simulations of the Abelian-Higgs model, we characterize the simultaneous emission of (scalar and gauge) particles and gravitational waves (GWs) by local string…
Gravitational Wave Emission from a Cosmic String Loop, I: Global Case
Jorge Baeza-Ballesteros, Edmund J. Copeland, Daniel G. Figueroa +1
We study the simultaneous decay of global string loops into scalar particles (massless and massive modes) and gravitational waves (GWs). Using field theory simulations in flat spac…
The strong backreaction regime in axion inflation
Daniel G. Figueroa, Joanes Lizarraga, Ander Urio +1
We study the non-linear dynamics of axion inflation, capturing for the first time the inhomogeneity and full dynamical range during strong backreaction, till the end of inflation.…
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…
Cosmology with the Laser Interferometer Space Antenna
Pierre Auclair, David Bacon, Tessa Baker +177
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravita…
Comment on "More Axions from Strings''
Mark Hindmarsh, Joanes Lizarraga, Asier Lopez-Eiguren +1
We comment on a claim that axion strings show a long-term logarithmic increase in the number of Hubble lengths per Hubble volume [arXiv:2007.04990], thereby violating the standard…
Loop decay in Abelian-Higgs string networks
Mark Hindmarsh, Joanes Lizarraga, Ander Urio +1
We study the decay of cosmic string loops in the Abelian-Higgs model. We confirm earlier results that loops formed by intersections of infinite strings formed from random-field ini…
Approach to scaling in axion string networks
Mark Hindmarsh, Joanes Lizarraga, Asier Lopez-Eiguren +1
We study the approach to scaling in axion string networks in the radiation era, through measuring the root-mean-square velocity as well as the scaled mean string separation …
Irreducible background of gravitational waves from a cosmic defect network: update and comparison of numerical techniques
Daniel G. Figueroa, Mark Hindmarsh, Joanes Lizarraga +1
Cosmological phase transitions in the early Universe may produce relics in the form of a network of cosmic defects. Independently of the order of a phase transition, topology of th…
The scaling density of axion strings
Mark Hindmarsh, Joanes Lizarraga, Asier Lopez-Eiguren +1
In the QCD axion dark matter scenario with post-inflationary Peccei-Quinn symmetry breaking, the number density of axions, and hence the dark matter density, depends on the length…
Type I Abelian Higgs strings: evolution and Cosmic Microwave Background constraints
Mark Hindmarsh, Joanes Lizarraga, Jon Urrestilla +2
We present results from the first simulations of networks of Type I Abelian Higgs cosmic strings to include both matter and radiation eras and Cosmic Microwave Background (CMB) con…
Exploring Cosmic Origins with CORE: Survey requirements and mission design
J. Delabrouille, P. de Bernardis, F. R. Bouchet +200
Future observations of cosmic microwave background (CMB) polarisation have the potential to answer some of the most fundamental questions of modern physics and cosmology. In this p…
Cosmic Microwave Background constraints for global strings and global monopoles
Asier Lopez-Eiguren, Joanes Lizarraga, Mark Hindmarsh +1
We present the first CMB power spectra from numerical simulations of the global O(N) linear -model with N = 2,3, which have global strings and monopoles as topological defects.…
Scaling from gauge and scalar radiation in Abelian Higgs string networks
Mark Hindmarsh, Joanes Lizarraga, Jon Urrestilla +2
We investigate cosmic string networks in the Abelian Higgs model using data from a campaign of large-scale numerical simulations on lattices of up to grid points. We obser…
Exploring Cosmic Origins with CORE: Inflation
CORE Collaboration, Fabio Finelli, Martin Bucher +129
We forecast the scientific capabilities to improve our understanding of cosmic inflation of CORE, a proposed CMB space satellite submitted in response to the ESA fifth call for a m…
Survival of pq-superstrings in field theory simulations
Joanes Lizarraga, Jon Urrestilla
We perform large-scale field theoretical simulations in expanding universe to characterize a network of strings that can form composed bound states. The network consists of two cop…
Energy-momentum correlations for Abelian Higgs cosmic strings
David Daverio, Mark Hindmarsh, Martin Kunz +2
We report on the energy-momentum correlators obtained with recent numerical simulations of the Abelian Higgs model, essential for the computation of cosmic microwave background and…