QUBIC I: Overview and ScienceProgram

Abstract

The Q $\&$ U Bolometric Interferometer for Cosmology (QUBIC) is a novel kind of polarimeter optimized for the measurement of the B-mode polarization of the Cosmic Microwave Background (CMB), which is one of the major challenges of observational cosmology. The signal is expected to be of the order of a few tens of nK, prone to instrumental systematic effects and polluted by various astrophysical foregrounds which can only be controlled through multichroic observations. QUBIC is designed to address these observational issues with a novel approach that combines the advantages of interferometry in terms of control of instrumental systematic effects with those of bolometric detectors in terms of wide-band, background-limited sensitivity. The QUBIC synthesized beam has a frequency-dependent shape that results in the ability to produce maps of the CMB polarization in multiple sub-bands within the two physical bands of the instrument (150 and 220 GHz). These features make QUBIC complementary to other instruments and makes it particularly well suited to characterize and remove Galactic foreground contamination. In this article, first of a series of eight, we give an overview of the QUBIC instrument design, the main results of the calibration campaign, and present the scientific program of QUBIC including not only the measurement of primordial B-modes, but also the measurement of Galactic foregrounds. We give forecasts for typical observations and measurements: with three years of integration on the sky and assuming perfect foreground removal as well as stable atmospheric conditions from our site in Argentina, our simulations show that we can achieve a statistical sensitivity to the effective tensor-to-scalar ratio (including primordial and foreground B-modes) $\sigma (r)=0.015$.

arXiv comment34 pages, 16 figures, accepted for publication by JCAP. Overview paper for a series of 8 QUBIC articles special JCAP edition dedicated to QUBIC

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• QUBIC V: Cryogenic system design and performance
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Cited by in corpus (22)

• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Improved Constraints on Cosmic Birefringence from the WMAP and Planck Cosmic Microwave Background Polarization Data
• Propagating Quantum Microwaves: Towards Applications in Communication and Sensing
• QUBIC V: Cryogenic system design and performance
• QUBIC VIII: Optical design and performance
• QUBIC II: Spectro-Polarimetry with Bolometric Interferometry
• Efficient ILC analysis on polarization maps after EB leakage correction
• QUBIC III: Laboratory Characterization
• An Implementation of a Channelizer based on a Goertzel Filter Bank for the Read-Out of Cryogenic Sensors
• QUBIC VI: cryogenic half wave plate rotator, design and performances
• QUIJOTE Scientific Results -- VII. Galactic AME sources in the QUIJOTE-MFI Northern Hemisphere Wide-Survey
• Forecast of foreground cleaning strategies for AliCPT-1
• DTS-100G -- A versatile heterogeneous MPSoC board for cryogenic sensor readout
• Enhancing CMB map reconstruction and power spectrum estimation with convolutional neural networks
• Polarization Calibration of a Microwave Polarimeter with Near-Infrared Up-Conversion for Optical Correlation and Detection
• The Simons Observatory: Validation of reconstructed power spectra from simulated filtered maps for the Small Aperture Telescope survey
• The LSPE-Strip Pointing Reconstruction and Star Tracker
• A Polarization Modulator Unit for the Mid- and High-Frequency Telescopes of the LiteBIRD mission
• Bias in the tensor-to-scalar ratio from self-interacting dark radiation
• QUBIC VII: The feedhorn-switch system of the technological demonstrator
• Optimal method for reconstructing polychromatic maps from broadband observations with an asymmetric antenna pattern
• Quantum measurement systems and applications to particle physics and cosmology