  A quantum internet, where widely separated quantum devices are coherently
connected, is a fundamental vision for local and global quantum information
networks and processing. Superconducting quantum devices can now perform
sophisticated quantum engineering locally on chip and a detailed method to
achieve coherent optical quantum interconnection between distant
superconducting devices is a vital, but highly challenging, goal. We describe a
concrete opto-magneto-mechanical system that can interconvert
microwave-to-optical quantum information with high fidelity. In one such node
we utilise the magnetic fields generated by the supercurrent of a flux qubit to
coherently modulate a mechanical oscillator that is part of a high-Q optical
cavity to achieve high fidelity microwave-to-optical quantum information
exchange. We analyze the transfer between two spatially distant nodes connected
by an optical fibre and using currently accessible parameters we predict that
the fidelity of transfer could be as high as $\sim 80\%$, even with significant
loss.
