  Several recent experiments have demonstrated the viability of a passive
device that can generate spin-entangled currents in two separate leads.
However, manipulation and measurement of individual flying qubits in a solid
state system has yet to be achieved. This is particularly difficult when a
macroscopic number of these indistinguishable qubits are present. In order to
access such an entangled current resource, we therefore show how to use it to
generate distributed, static entanglement. The spatial separation between the
entangled static pair can be much higher than that achieved by only exploiting
the tunnelling effects between quantum dots. Our device is completely passive,
and requires only weak Coulomb interactions between static and flying spins. We
show that the entanglement generated is robust to decoherence for large enough
currents.
