Recently, a non-trivial relation between the quasi-particle spectrum and
entanglement entropy production was discovered in non-integrable quenches in
the paramagnetic Ising quantum spin chain. Here we study the dynamics of
analogous quenches in the quantum Potts spin chain. Tuning the parameters of
the system, we observe a sudden increase in the entanglement production rate,
which is shown to be related to the appearance of new quasiparticle excitations
in the post-quench spectrum. Our results demonstrate the generality of the
effect and support its interpretation as the non-equilibrium version of the
well-known Gibbs paradox related to mixing entropy which appears in systems
with a non-trivial quasi-particle spectrum.Comment: 15 pages, pdflatex, 30 pdf figures. v2: reformatted, 22 pages, typos
correcte