359 citations · 929 across the 20 of their papers we have counts for
22 papers
The art of simulating the early Universe. Part III: Scalar-Gauge-Fluid Dynamics
Daniel G. Figueroa, Kenneth Marschall, Antonino S. Midiri +1
We discuss lattice methods for the simulation of fluid dynamics in the early Universe. This review represents a third entry in the monographic series on lattice cosmology technique…
Fluid perturbations from expanding bubbles in first-order phase transitions
Chiara Caprini, Antonino S. Midiri, Simona Procacci +1
We study the power spectrum of the velocity field induced during a first-order phase transition occurring in the radiation-dominated era. We focus on the phase of bubble expansion,…
Primordial magnetic field from chiral plasma instability with sourcing
Murman Gurgenidze, Andrew J. Long, Alberto Roper Pol +2
In an electron-positron plasma, an imbalance in the number of right- and left-chiral particles can lead to the growth of a helical magnetic field through a phenomenon called the ch…
Gravitational wave spectra for cosmological phase transitions with non-linear decay of the fluid motion
Isak Stomberg, Alberto Roper Pol
We summarize the theoretical framework of gravitational wave (GW) production by bulk fluid motion induced by expanding broken-phase bubbles during a first-order phase transition. U…
Relativistic magnetohydrodynamics in the early Universe
Alberto Roper Pol, Antonino Salvino Midiri
We review the conservation laws of magnetohydrodynamics (MHD) in an expanding homogeneous and isotropic Universe that can be applied to the study of early Universe physics during t…
Gravitational waves from first-order phase transitions: from weak to strong
Chiara Caprini, Ryusuke Jinno, Thomas Konstandin +3
We study the generation of gravitational waves (GWs) during a cosmological first-order phase transition (PT) using the recently introduced Higgsless approach to numerically simulat…
The Lunar Gravitational-wave Antenna: Mission Studies and Science Case
Parameswaran Ajith, Pau Amaro Seoane, Manuel Arca Sedda +83
The Lunar Gravitational-wave Antenna (LGWA) is a proposed array of next-generation inertial sensors to monitor the response of the Moon to gravitational waves (GWs). Given the size…
Gravitational waves from first-order phase transitions in LISA: reconstruction pipeline and physics interpretation
Chiara Caprini, Ryusuke Jinno, Marek Lewicki +6
We develop a tool for the analysis of stochastic gravitational wave backgrounds from cosmological first-order phase transitions with LISA: we initiate a template databank for these…
Characterization of the gravitational wave spectrum from sound waves within the sound shell model
Alberto Roper Pol, Simona Procacci, Chiara Caprini
We compute the gravitational wave (GW) spectrum sourced by sound waves produced during a first-order phase transition in the radiation-dominated epoch. The correlator of the veloci…
LISA and -ray telescopes as multi-messenger probes of a first-order cosmological phase transition
A. Roper Pol, A. Neronov, C. Caprini +2
We study two possible cosmological consequences of a first-order phase transition in the temperature range of 1 GeV to TeV: the generation of a stochastic gravitational wave…
The second data release from the European Pulsar Timing Array: IV. Implications for massive black holes, dark matter and the early Universe
J. Antoniadis, P. Arumugam, S. Arumugam +111
The European Pulsar Timing Array (EPTA) and Indian Pulsar Timing Array (InPTA) collaborations have measured a low-frequency common signal in the combination of their second and fir…
Gravitational waves from MHD turbulence at the QCD phase transition as a source for Pulsar Timing Arrays
Alberto Roper Pol
We propose that the recent observations reported by the different Pulsar Timing Array (PTA) collaborations (i.e.~IPTA, EPTA, PPTA, and NANOGrav) of a common process over several pu…
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…
Gravitational wave signal from primordial magnetic fields in the Pulsar Timing Array frequency band
Alberto Roper Pol, Chiara Caprini, Andrii Neronov +1
The NANOGrav, Parkes, European, and International Pulsar Timing Array (PTA) Collaborations have reported evidence for a common-spectrum process that can potentially correspond to a…
Leading-order nonlinear gravitational waves from reheating magnetogeneses
Yutong He, Alberto Roper Pol, Axel Brandenburg
We study the leading-order nonlinear gravitational waves (GWs) produced by an electromagnetic (EM) stress in reheating magnetogenesis scenarios. Both nonhelical and helical magneti…
Gravitational radiation from MHD turbulence in the early universe
Alberto Roper Pol
I briefly discuss recent results of numerical simulations addressing the generation of a cosmological gravitational wave background produced by turbulence sources in the early univ…
The scalar, vector, and tensor modes in gravitational wave turbulence simulations
Axel Brandenburg, Grigol Gogoberidze, Tina Kahniashvili +3
We study the gravitational wave (GW) signal sourced by primordial turbulence that is assumed to be present at cosmological phase transitions like the electroweak and quantum chromo…
Circular Polarization of Gravitational Waves from Early-Universe Helical Turbulence
Tina Kahniashvili, Axel Brandenburg, Grigol Gogoberidze +2
We perform direct numerical simulations to compute the net circular polarization of gravitational waves from helical (chiral) turbulent sources in the early Universe for a variety…
NANOGrav signal from MHD turbulence at QCD phase transition in the early universe
A. Neronov, A. Roper Pol, C. Caprini +1
The NANOGrav collaboration has recently reported evidence for the existence of a stochastic gravitational wave background in the 1-100 nHz frequency range. We argue that such backg…
E and B polarizations from inhomogeneous and solar surface turbulence
Axel Brandenburg, Andrea Bracco, Tina Kahniashvili +4
Gradient- and curl-type or E- and B-type polarizations have been routinely analyzed to study the physics contributing to the cosmic microwave background polarization and galactic f…
Evolution of hydromagnetic turbulence from the electroweak phase transition
Axel Brandenburg, Tina Kahniashvili, Sayan Mandal +3
We present new simulations of decaying hydromagnetic turbulence for a relativistic equation of state relevant to the early universe. We compare helical and nonhelical cases either…
The dynamo effect in decaying helical turbulence
Axel Brandenburg, Tina Kahniashvili, Sayan Mandal +3
We show that in decaying hydromagnetic turbulence with initial kinetic helicity, a weak magnetic field eventually becomes fully helical. The sign of magnetic helicity is opposite t…