Self assembled Wigner crystals as mediators of spin currents and quantum information
arXiv:1507.04138 · doi:10.1103/PhysRevLett.115.216804
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.
5 pages of main text and 6 pages of supplemental materials
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Cited by in corpus (4)
- Imaging the zigzag Wigner crystal in confinement-tunable quantum wires
- Wigner Crystals in Two-Dimensional Transition-Metal Dichalcogenides: Spin Physics and Readout
- Ground-state electronic structure of quasi-one-dimensional wires in semiconductor heterostructures
- A quantum phase transition detected through one dimensional ballistic conductance