  In this work we consider the time evolution of charged Renyi entanglement
entropies after exciting the vacuum with local fermionic operators. In order to
explore the information contained in charged Renyi entropies, we perform
computations of their excess due to the operator excitation in 2d CFT, free
fermionic field theories in various dimensions as well as holographically. In
the analysis we focus on the dependence on the entanglement charge, the
chemical potential and the spacetime dimension. We find that excesses of
charged (Renyi) entanglement entropy can be interpreted in terms of charged
quasiparticles. Moreover, we show that by appropriately tuning the chemical
potential charged Renyi entropies can be used to extract entanglement in a
certain charge sector of the excited state.
