  The Q & U Bolometric Interferometer for Cosmology, QUBIC, is an innovative
experiment designed to measure the polarization of the Cosmic Microwave
Background and in particular the signature left therein by the inflationary
expansion of the Universe. The expected signal is extremely faint, thus extreme
sensitivity and systematic control are necessary in order to attempt this
measurement. QUBIC addresses these requirements using an innovative approach
combining the sensitivity of Transition Edge Sensor cryogenic bolometers, with
the deep control of systematics characteristic of interferometers. This makes
QUBIC unique with respect to others classical imagers experiments devoted to
the CMB polarization. In this contribution we report a description of the QUBIC
instrument including recent achievements and the demonstration of the
bolometric interferometry performed in lab. QUBIC will be deployed at the
observation site in Alto Chorrillos, in Argentina at the end of 2019.
