  We consider a multipartite system consisting of two noninteracting qubits
each embedded in a single-mode leaky cavity, in turn connected to an external
bosonic reservoir. Initially, we take the two qubits in an entangled state
while the cavities and the reservoirs have zero photons. We investigate, in
this six-partite quantum system, the transfer of quantum discord from the
qubits to the cavities and reservoirs. We show that this transfer occurs also
when the cavities are not entangled. Moreover, we discuss how quantum discord
can be extracted from the cavities and transferred to distant systems by
traveling leaking photons, using the input-output theory.
