The LiteBIRD satellite (Lite satellite for the study of 𝐵-mode polarization and Inflation from
cosmic background Radiation Detection) will perform a measurement of the cosmic microwave
background polarization anisotropies on large and intermediate angular scales. Its sensitivity and
wide frequency coverage in 15 bands will enable unprecedented accuracy in the measurement
and foreground cleaning of the signal in 𝐵-mode polarization and a cosmic-variance-limited
measurement of the 𝐸-mode polarization. Such data will have deep implications for cosmology
and fundamental physics. The determination of the energy scale of inflation and constraints on
its dynamics from 𝐵-mode polarization will shed light on one of the most important phases in
the history of the Universe and the fundamental physics it implies. LiteBIRD measurements
will also deepen our knowledge of reionization, allowing us to reduce the largest uncertainty in
standard cosmology after-Planck, as well as to target some other major cosmological signatures,
for examples large-scale anomalies, parity-violating phenomena such as cosmic birefringence, and
magnetism in the early Universe.