Challenges and opportunities of gravitational-wave searches at MHz to GHz frequencies
The first direct measurement of gravitational waves by the LIGO and Virgo collaborations
has opened up new avenues to explore our Universe. This white paper outlines the …
has opened up new avenues to explore our Universe. This white paper outlines the …
Ultra-light dark matter
EGM Ferreira - The Astronomy and Astrophysics Review, 2021 - Springer
Ultra-light dark matter is a class of dark matter models (DM), where DM is composed by
bosons with masses ranging from 10^-24\, eV< m< eV 10-24 eV< m< eV. These models …
bosons with masses ranging from 10^-24\, eV< m< eV 10-24 eV< m< eV. These models …
[HTML][HTML] NANOGrav signal from the end of inflation and the LIGO mass and heavier primordial black holes
A Ashoorioon, K Rezazadeh, A Rostami - Physics Letters B, 2022 - Elsevier
Abstract Releasing the 12.5-year pulsar timing array data, the North American Nanohertz
Observatory for Gravitational Waves (NANOGrav) has recently reported the evidence for a …
Observatory for Gravitational Waves (NANOGrav) has recently reported the evidence for a …
Oscillating scalar fields and the Hubble tension: a resolution with novel signatures
We present a detailed investigation of a subdominant oscillating scalar field [“early dark
energy”(EDE)] in the context of resolving the Hubble tension. Consistent with earlier work …
energy”(EDE)] in the context of resolving the Hubble tension. Consistent with earlier work …
The first three seconds: a review of possible expansion histories of the early universe
R Allahverdi, MA Amin, A Berlin, N Bernal… - arXiv preprint arXiv …, 2020 - arxiv.org
It is commonly assumed that the energy density of the Universe was dominated by radiation
between reheating after inflation and the onset of matter domination 54,000 years later …
between reheating after inflation and the onset of matter domination 54,000 years later …
Detection of early-universe gravitational-wave signatures and fundamental physics
R Caldwell, Y Cui, HK Guo, V Mandic, A Mariotti… - General relativity and …, 2022 - Springer
Detection of a gravitational-wave signal of non-astrophysical origin would be a landmark
discovery, potentially providing a significant clue to some of our most basic, big-picture …
discovery, potentially providing a significant clue to some of our most basic, big-picture …
Inflation: theory and observations
Cosmic inflation provides a window to the highest energy densities accessible in nature, far
beyond those achievable in any realistic terrestrial experiment. Theoretical insights into the …
beyond those achievable in any realistic terrestrial experiment. Theoretical insights into the …
Large-misalignment mechanism for the formation of compact axion structures: Signatures from the QCD axion to fuzzy dark matter
Axions are some of the best motivated particles beyond the Standard Model. We show how
the attractive self-interactions of dark matter (DM) axions over a broad range of masses, from …
the attractive self-interactions of dark matter (DM) axions over a broad range of masses, from …
CosmoLattice: A modern code for lattice simulations of scalar and gauge field dynamics in an expanding universe
This paper describes C osmo L attice, a modern package for lattice simulations of the
dynamics of interacting scalar and gauge fields in an expanding universe. C osmo L attice …
dynamics of interacting scalar and gauge fields in an expanding universe. C osmo L attice …
The art of simulating the early universe. Part I. Integration techniques and canonical cases
We present a comprehensive discussion on lattice techniques for the simulation of scalar
and gauge field dynamics in an expanding universe. After reviewing the continuum …
and gauge field dynamics in an expanding universe. After reviewing the continuum …