title: Self-Assembled Wigner Crystals as Mediators of Spin Currents and Quantum Information.
abstract: 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.
authors.affiliation: Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
authors.forename: Bobby
authors.initials: B
authors.lastname: Antonio
authors.affiliation: Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
authors.forename: Abolfazl
authors.initials: A
authors.lastname: Bayat
authors.affiliation: Department of Electronic and Electrical Engineering, University College London, London WC1E 7JE, United Kingdom.|London Centre for Nanotechnology, 17-19 Gordon Street, London WC1H 0AH, United Kingdom.
authors.forename: Sanjeev
authors.initials: S
authors.lastname: Kumar
authors.affiliation: Department of Electronic and Electrical Engineering, University College London, London WC1E 7JE, United Kingdom.|London Centre for Nanotechnology, 17-19 Gordon Street, London WC1H 0AH, United Kingdom.
authors.forename: Michael
authors.initials: M
authors.lastname: Pepper
authors.affiliation: Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
authors.forename: Sougato
authors.initials: S
authors.lastname: Bose