  We study the time evolution of the logarithmic negativity after a global
quantum quench. In a 1+1 dimensional conformal invariant field theory, we
consider the negativity between two intervals which can be either adjacent or
disjoint. We show that the negativity follows the quasi-particle interpretation
for the spreading of entanglement. We check and generalise our findings with a
systematic analysis of the negativity after a quantum quench in the harmonic
chain, highlighting two peculiar lattice effects: the late birth and the sudden
death of entanglement.
