Cosmic Microwave Background from Effective Field Theory
Universe, 2019 In this work, we study the key role of generic Effective Field Theory (EFT) framework to quantify the correlation functions in a quasi de Sitter background for an arbitrary initial choice of the quantum vacuum state. We perform the computation in unitary
Sayantan Choudhury
doaj +1 more source
Optimization of a Microwave Polarimeter for Astronomy with Optical Correlation and Detection
Sensors, 2023 Cosmic Microwave Background (CMB) B-modes detection is the main focus of future CMB experiments because of the valuable information it contains, particularly to probe the physics of the very early universe. For this reason, we have developed an optimized
Guillermo Pascual-Cisneros +2 more
doaj +1 more source
Cosmic Microwave Background Temperature at Galaxy Clusters [PDF]
, 2002 We have deduced the cosmic microwave background (CMB) temperature in the Coma cluster (A1656, $z=0.0231$), and in A2163 ($z=0.203$) from spectral measurements of the Sunyaev-Zel'dovich (SZ) effect over four passbands at radio and microwave frequencies ...
A. Cooray +12 more
core +4 more sources
A Measurement of the Cosmic Microwave Background B-mode Polarization Power Spectrum at Subdegree Scales from Two Years of polarbear Data [PDF]
, 2017 We report an improved measurement of the cosmic microwave background B-mode polarization power spectrum with the Polarbear experiment at 150 GHz. By adding new data collected during the second season of observations (2013–2014) to re-analyzed data from ...
T. C. C. P. Ade +80 more
semanticscholar +1 more source
Self-Similar Symmetry Model and Cosmic Microwave Background
Frontiers in Applied Mathematics and Statistics, 2016 In this paper, we present the self-similar symmetry (SSS) model that describes the hierarchical structure of the universe. The model is based on the concept of self-similarity, which explains the symmetry of the cosmic microwave background (CMB).
Tomohide eSonoda
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Recent results and perspectives on cosmology and fundamental physics from microwave surveys [PDF]
, 2015 Recent cosmic microwave background data in temperature and polarization have reached high precision in estimating all the parameters that describe the current so-called standard cosmological model.
Alighieri, Sperello Di Serego +16 more
core +6 more sources
Limits on primordial black holes from $\mu$ distortions in cosmic microwave background [PDF]
, 2017 If primordial black holes (PBHs) form directly from inhomogeneities in the early universe, then the number in the mass range $10^6 -10^9M_{\odot}$ is severely constrained by upper limits to the $\mu$-distortion in the cosmic microwave background (CMB ...
T. Nakama, B. Carr, J. Silk
semanticscholar +1 more source
Observing Dirac neutrinos in the cosmic microwave background [PDF]
Physical Review D, 2019 Planned CMB Stage IV experiments have the potential to measure the effective number of relativistic degrees of freedom in the early Universe, $N_\text{eff}$, with percent-level accuracy.
K. Abazajian, J. Heeck
semanticscholar +1 more source
Large Scale Cosmic Microwave Background Anisotropies and Dark Energy [PDF]
, 2003 In this note we investigate the effects of perturbations in a dark energy component with a constant equation of state on large scale cosmic microwave background anisotropies. The inclusion of perturbations increases the large scale power.
A. M. Lewis +39 more
core +2 more sources
Prospects for Measuring Cosmic Microwave Background Spectral Distortions in the Presence of Foregrounds [PDF]
, 2017 Measurements of cosmic microwave background spectral distortions have profound implications for our understanding of physical processes taking place over a vast window in cosmological history.
M. Abitbol +3 more
semanticscholar +1 more source