CMB polarization constraints on inflation

1999 ◽  
Author(s):  
William H. Kinney
Keyword(s):  
Cmb Polarization

The imprint of GWs on the CMB

2018 ◽  
Author(s):  
Michele Maggiore
Keyword(s):  
Boltzmann Equation ◽  
Cmb Polarization

CMB multipoles. Photon geodesics in perturbed FRW. Temperature anisotropies. Sachs-Wolfe, ISW and Doppler contributions. Boltzmann equation. CMB polarization. E and B modes

scholarly journals Probing primordial gravitational waves: Ali CMB Polarization Telescope

2018 ◽  
Vol 6 (1) ◽  
pp. 145-154 ◽  
Author(s):  
Hong Li ◽  
Si-Yu Li ◽  
Yang Liu ◽  
Yong-Ping Li ◽  
Yifu Cai ◽  
...  
Keyword(s):  
Gravitational Waves ◽  
High Energy Physics ◽  
Transition Edge Sensor ◽  
High Energy ◽  
Cpt Symmetry ◽  
Joint Project ◽  
Current Limit ◽  
Scientific Goal ◽  
Primordial Gravitational Waves ◽  
Cmb Polarization

Abstract In this paper, we will give a general introduction to the Ali CMB Polarization Telescope (AliCPT) project, which is a Sino–US joint project led by the Institute of High Energy Physics and involves many different institutes in China. It is the first ground-based Cosmic Microwave Background (CMB) polarization experiment in China and an integral part of China's Gravitational-wave Program. The main scientific goal of the AliCPT project is to probe the primordial gravitational waves (PGWs) originating from the very early Universe. The AliCPT project includes two stages. The first stage, referred to as AliCPT-1, is to build a telescope in the Ali region of Tibet at an altitude of 5250 meters. Once completed, it will be the highest ground-based CMB observatory in the world and will open a new window for probing PGWs in the northern hemisphere. The AliCPT-1 telescope is designed to have about 7000 transition-edge sensor detectors at 95 GHz and 150 GHz. The second stage is to have a more sensitive telescope (AliCPT-2) with more than 20 000 detectors. Our simulations show that AliCPT will improve the current constraint on the tensor-to-scalar ratio r by one order of magnitude with three years' observation. Besides the PGWs, AliCPT will also enable a precise measurement of the CMB rotation angle and provide a precise test of the CPT symmetry. We show that three years' observation will improve the current limit by two orders of magnitude.

scholarly journals CMB polarization can constrain cosmology better than CMB temperature

2014 ◽  
Vol 90 (6) ◽  
Author(s):  
Silvia Galli ◽  
Karim Benabed ◽  
François Bouchet ◽  
Jean-François Cardoso ◽  
Franz Elsner ◽  
...  
Keyword(s):  
Cmb Polarization ◽  
Cmb Temperature ◽  
Better Than

scholarly journals Comparison of the Planck 2018 CMB polarization maps in the BICEP2/Keck region

2020 ◽  
Vol 2020 (06) ◽  
pp. 023-023
Author(s):  
Hao Liu ◽  
James Creswell ◽  
Pavel Naselsky
Keyword(s):  
Cmb Polarization

scholarly journals CMB polarization as complementary information to anisotropies

2003 ◽  
Vol 4 (8) ◽  
pp. 917-924 ◽  
Author(s):  
Jean Kaplan ◽  
Jacques Delabrouille ◽  
Pablo Fosalba ◽  
Cyrille Rosset
Keyword(s):  
Complementary Information ◽  
Cmb Polarization

Geometrical aspects of hypermagnetic field interactions

2022 ◽  
Author(s):  
Diego Julio Cirilo-Lombardo
Keyword(s):  
Polarization Plane ◽  
Generalized Born ◽  
Torsion Field ◽  
Cmb Polarization

Abstract We investigate the role of a dynamical torsion field coming from a geometrical non Riemannian model. This model is reminiscent of a generalized Born-Infeld theory and the torsion plays a fundamental role trough its Hodge dual: the pseudovector h_{μ}. This h_{μ} contains axion, Kalb-Ramond 2-form and physical observables of macroscopic character. An emergent interaction Lagrangian arises from the model and it is compared with a superstring inspired one from [8] pulling out several important consequences in favor of our proposal, as the possibility of establishing a clear connection between the change of CMB polarization plane and the anomalous current n_{chiral}.

scholarly journals Correlation Functions of CMB Anisotropy and Polarization

1999 ◽  
Vol 183 ◽  
pp. 104-104
Author(s):  
Kin-Wang Ng
Keyword(s):  
Correlation Function ◽  
Stokes Parameters ◽  
Temperature Anisotropy ◽  
Microwave Background ◽  
Signal To Noise ◽  
Polarization Experiment ◽  
Promising Tool ◽  
Cmb Polarization ◽  
Full Analysis ◽  
Cross Correlations

While the temperature anisotropy of the cosmic microwave background is proved to be a promising tool for probing the early Universe, the CMB polarization is another important clue for extracting more cosmic information. We give a full analysis of the auto- and cross-correlations between the CMB Stokes parameters. In particular, we derive the windowing function for an antenna with Gaussian response in polarization experiment, and construct correlation function estimators corrected for instrumental noise. They are applied to calculate the signal to noise ratios for future MAP and Planck anisotropy and polarization measurements.

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