Mesoscopic Stern-Gerlach device to polarize spin currents

Abstract

Spin preparation and spin detection are fundamental problems in spintronics and in several solid state proposals for quantum information processing. Here we propose the mesoscopic equivalent of an optical polarizing beam splitter (PBS). This interferometric device uses non-dispersive phases (Aharonov-Bohm and Rashba) in order to separate spin up and spin down carriers into distinct outputs and thus it is analogous to a Stern-Gerlach apparatus. It can be used both as a spin preparation device and as a spin measuring device by converting spin into charge (orbital) degrees of freedom. An important feature of the proposed spin polarizer is that no ferromagnetic contacts are used.

Updated to the published version

References in corpus (3)

• Quantum Transport in Nonuniform Magnetic Fields: Aharonov-Bohm Ring as a Spin Switch
• Charge fluctuation induced dephasing in a gated mesoscopic interferometer
• Filtering spin with tunnel-coupled electron wave guides

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• Rashba spin precession in quantum Hall edge channels
• Non-local Aharonov-Bohm conductance oscillations in an asymmetric quan-tum ring
• Filtering of spin currents based on ballistic ring
• Multichannel effects in Rashba quantum wires
• Curvature effect on spin polarization in a three-terminal geometry in presence of Rashba spin-orbit interaction
• Gate-controlled anisotropy in Aharonov-Casher spin interference: signatures of Dresselhaus spin-orbit inversion and spin phases
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• Two-dimensional electron scattering in regions of nonuniform spin-orbit coupling
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• Cyclic permutations for qudits in $d$ dimensions
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• Quantum Logic Processor: A Mach Zehnder Interferometer based Approach
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• Reflection and refraction of an electron spin at the junction between two two-dimensional regions with and without spin-orbit interaction
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