  We study the protocol of entanglement harvesting when the particle detectors
that harvest entanglement from the field are replaced by fully relativistic
quantum field theories. We show that two localized modes of the quantum field
theories are able to harvest the same amount of leading order entanglement as
two non-relativistic particle detectors, thus implying that QFT probes can
generally harvest more entanglement than particle detectors. These results
legitimize the use of particle detectors to study entanglement harvesting
regardless of their internally non-relativistic nature.
