Neutrino flow is the dominant mechanism of energy transfer in the latest stages of supernovae explosions and compact stars. The Standard Model of particle physics and accelerator data, provide a satisfactory description of neutrino physics in vacuum up to TeV scale. Nevertheless modeling the dynamics of neutrino interactions in the nuclear environment involves severe difficulties. In this thesis we carry out a consistent description of the Weak response in Neutron Matter. In particular we focus on the neutrino interaction in a specific kinematic region (low momentum transfer) where collective modes and many-body correction are known to play a key role. Starting from a "correlated" nucleon-nucleon interaction, derived within the formalism of Correlated Basis Functions theory, the Landau parameters are evaluated and then used to perform the Weak response and the neutrino mean free path. The proposed approach allows for a consistent description of different interaction effects and have been extended to describe matter at nonvanishing temperature.