  Technological applications of many-body structures that emerge in gated
devices under minimal control are largely unexplored. Here we show how emergent
Wigner crystals in a semiconductor quantum wire can facilitate a pivotal
requirement for a scalable quantum computer, namely transmitting quantum
information encoded in spins faithfully over a distance of micrometers. The
fidelity of the transmission is remarkably high, faster than the relevant
decohering effects, independent of the details of the spatial charge
configuration in the wire, and realizable in dilution refrigerator
temperatures. The transfer can evidence near unitary many-body nonequilibrium
dynamics hitherto unseen in a solid-state device. It could also be useful in
spintronics as a method for pure spin current over a distance without charge
movement.
