  In this work we study the production and swapping of non-gaussian
multipartite entanglement in a setup containing a parametric amplifier which
generates three photons in different modes coupled to three qubits. We prove
that the entanglement generated in this setup is of nongaussian nature. We
introduce witnesses of genuine tripartite nongaussian entanglement, valid both
for mode and qubit entanglement. Moreover, those witnesses show that the
entanglement generated among the photons can be swapped to the qubits, and
indeed the qubits display nongaussian genuine tripartite entanglement over a
wider parameter regime, suggesting that our setup could be a useful tool to
extract entanglement generated in higher-order parametric amplification for
quantum metrology or quantum computing applications.
