  In this work we analyse the entanglement entropy in deep inelastic scattering
off protons and nuclei. It is computed based on the formalism where the
partonic state at small-x is maximally entangled with proton being constituted
by large number of microstates occuring with equal probabilities. We consider
analytical expressions for the number of gluons, N_{gluon}, obtained from gluon
saturation models for the dipole-target amplitudes within the QCD color dipole
picture. In particular, the nuclear entanglement entropy per nucleon is
studied. We also study the underlying uncertainties on these calculations and
compare the results to similar investigations in literature.
