Orateur
Description
The Q\&U Bolometric Interferometer for Cosmology (QUBIC) is the first bolometric interferometer 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, which are both key features in the quest for the faint signal of the primordial B-modes.
A unique feature of bolometric interferometry 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 $\Delta\nu/\nu\sim 0.04$. This is a key tool for controlling the Galactic foregrounds contamination.
The first qubic prototype is the so-called Technological Demonstrator. It has successfully completed laboratory testing and it will observe about 1% of the sky at 150 GHz from the high altitude site Alto Chorillo, Argentina, starting from the beginning of 2023. Subsequently, during 2024, the full instrument is expected to be operational and will observe in two frequency bands, centered at 150 GHz and 220 GHz.
In this talk, we describe the principles of Bolometric Interferometry, the current status of the QUBIC experiment and its future prospects.