https://doi.org/10.1051/epjconf/202429300030
Measuring the CMB primordial B-modes with Bolometric Interferometry
Status and future prospects of the QUBIC experiment
1 Università degli studi di Milano, Milano, Italy
2 Istituto Nazionale di Fisica Nucleare (INFN) sezione di Milano, Milano, Italy
3 Cardiff University, Cardiff CF10 3AT, United Kingdom
4 Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Argentina
5 Università di Roma - La Sapienza, Italy
6 Centro Atómico Bariloche and Instituto Balseiro (CNEA), Argentina
7 Institut de Recherche en Astrophysique et Planétologie, Toulouse (CNRS-INSU), France
8 Università di Milano - Bicocca, Milano, Italy
9 INFN Milano-Bicocca, Milano, Italy
10 INFN sezione di Roma, Roma, Italy
11 Centre de Nanosciences et de Nanotechnologies, Orsay, France
12 Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, Orsay, France
13 Centro Atómico Constituyentes (CNEA), Argentina
14 University of Richmond, Richmond, USA
15 Université de Paris, CNRS, Astroparticule et Cosmologie, F-75006 Paris, France
16 Facultad de Ciencias Astronómicas y Geofísicas (Universidad Nacional de La Plata), Argentina
17 National University of Ireland, Maynooth, Ireland
18 University of Manchester, UK
19 Institut d’Astrophysique Spatiale, Orsay (CNRS-INSU), France
20 Italian Space Agency, Rome, Italy
21 Institute Argentine de Radioastronomía (CONICET, CIC), Argentina
22 California Institute of Technology, Pasadena, USA
23 INFN - Pisa Section, 56127 Pisa, Italy
24 University of Wisconsin, Madison, USA
* e-mail: aniello.mennella@fisica.unimi.it
Published online: 28 March 2024
The Q&U Bolometric Interferometer for Cosmology (QL’BIC) is the first bolometric interferometer designed to measure the primordial B-mode polarization of the Cosmic Microwave Background (CMB). Bolometric interferometry is a novel technique that combines the sensitivity of bolometric detectors with the control of systematic effects that is typical of interferometry, both key features in the quest for the faint signal of the primordial B-modes. A unique feature is the so-called “spectral imaging”, i.e., the ability to recover the sky signal in several sub-bands within the physical band during data analysis. This feature provides an in-band spectral resolution of ∆v/v ~ 0.04 that is unattainable by a traditional imager. This is a key tool for controlling the Galactic foregrounds contamination. In this paper, we describe the principles of bolometric interferometry, the current status of the QU BIC experiment and future prospects.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.