Spatial Analogue of Quantum Spin Dynamics via Spin-Orbit Interaction

Details Spatial Analogue of Quantum Spin Dynamics via Spin-Orbit Interaction Spatial Analogue of Quantum Spin Dynamics via Spin-Orbit Interaction

2011-11-22

arxiv.org/abs/1111.5311v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures

Scientific paper

We map electron spin dynamics from time to space in quantum wires with spatially uniform and oscillating Rashba spin-orbit coupling. The presence of the spin-orbit interaction introduces pseudo-Zeeman couplings of the electron spins to effective magnetic fields. We show that by periodically modulating the spin-orbit coupling along the quantum wire axis, it is possible to create the spatial analogue of spin resonance, without the need for any real magnetic fields. The mapping of time-dependent operations onto a spatial axis suggests a new mode for quantum information processing in which gate operations are encoded into the band structure of the material. We describe a realization of such materials within nanowires at the interface of LaAlO3/SrTiO3 heterostructures.

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