Guada Escalona, Victor Francisco

As in boiling super-heated liquids, the decay of a false vacuum is a first-order phase transition. A local ground state decays to an energetically more favorable minimum of lower energy due to the thermal and quantum fluctuations of the fields. In this work, we present an efficient semi-analytic method that computes the decay rate of such a state f...

Bautista, Julian E. Paviot, Romain Magaña, Mariana Vargas de la Torre, Sylvain Fromenteau, Sebastien Gil-Marín, Hector Ross, Ashley J. Burtin, Etienne Dawson, Kyle S. Hou, Jiamin
...

We present the cosmological analysis of the configuration-space anisotropic clustering in the completed Sloan Digital Sky Survey IV (SDSS-IV) extended Baryon Oscillation Spectroscopic Survey (eBOSS) DR16 galaxy sample. This sample consists of luminous red galaxies (LRGs) spanning the redshift range $0.6

Manfredi, Giovanni
Published in
General Relativity and Gravitation

We propose to reinterpret Einstein’s field equations as a nonlinear eigenvalue problem, where the cosmological constant Λ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$...

Burns, Eric
Published in
Living Reviews in Relativity

Neutron star mergers are the canonical multimessenger events: they have been observed through photons for half a century, gravitational waves since 2017, and are likely to be sources of neutrinos and cosmic rays. Studies of these events enable unique insights into astrophysics, particles in the ultrarelativistic regime, the heavy element enrichment...

Murgia, Riccardo Abellán, Guillermo F. Poulin, Vivian

Early Dark Energy (EDE) contributing a fraction $f_{\rm EDE}(z_c)\sim 10 \%$ of the energy density of the universe around $z_c\simeq 3500$ and diluting as or faster than radiation afterwards, can provide a resolution to the Hubble tension, the $\sim 5\sigma$ discrepancy between the $H_0$ value derived from early- and late-universe observations with...

Barrau, Aurélien Ferdinand, Léonard Martineau, Killian Renevey, Cyril

The idea that, after their evaporation, Planck-mass black holes might tunnel into metastable white holes has recently been intensively studied. Those relics have been considered as a dark matter candidate. We show that the model is severely constrained and underline some possible detection paths. We also investigate, in a more general setting, the ...

Yılmaz, Ali Osman Güdekli, Ertan
Published in
Scientific Reports

We investigate Friedmann–Lamaitre–Robertson–Walker (FLRW) models with modified Chaplygin gas and cosmological constant, using dynamical system methods. We assume p=(γ-1)μ-Aμα\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek...

Osato, Ken Takada, Masahiro

The thermal Sunyaev-Zel'dovich (tSZ) effect is a powerful probe of cosmology. The statistical errors in the tSZ power spectrum measurements are dominated by the presence of massive clusters in a survey volume that are easy to identify on individual cluster basis. First, we study the impact of super sample covariance (SSC) on the tSZ power spectrum ...

Porredon, A. Crocce, M. Fosalba, P. Elvin-Poole, J. Rosell, A. Carnero Cawthon, R. Eifler, T. F. Fang, X. Ferrero, I. Krause, E.
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We investigate potential gains in cosmological constraints from the combination of galaxy clustering and galaxy-galaxy lensing by optimizing the lens galaxy sample selection using information from Dark Energy Survey (DES) Year 3 data and assuming the DES Year 1 Metacalibration sample for the sources. We explore easily reproducible selections based ...

Muir, J. Baxter, E. Miranda, V. Doux, C. Ferté, A. Leonard, C. D. Huterer, D. Jain, B. Lemos, P. Raveri, M.
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We analyze Dark Energy Survey (DES) data to constrain a cosmological model where a subset of parameters -- focusing on $\Omega_m$ -- are split into versions associated with structure growth (e.g. $\Omega_m^{\rm grow}$) and expansion history (e.g. $\Omega_m^{\rm geo}$). Once the parameters have been specified for the $\Lambda$CDM cosmological model,...