Entanglement of Electron Spin and Orbital States in Spintronic Quantum Transport

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dc.creatorNikolic, Branislav K.
dc.date2003-01-31
dc.date2003-10-16
dc.date.accessioned2026-07-07T02:49:27Z
dc.date.available2026-07-07T02:49:27Z
dc.descriptionAn electron within a mesoscopic (quantum-coherent) spintronic structure is described by a single wave function which, in the presence of both charge scattering and spin-orbit coupling, encodes an information about {\em entanglement} of its spin and orbital degrees of freedom. The quantum state--an {\em improper} mixture--of experimentally detectable spin subsystem is elucidated by evaluating quantum information theory measures of entanglement in the scattering states which determine {\em quantum transport} properties of spin-polarized electrons injected into a two-dimensional disordered Rashba spin-split conductor that is attached to the ferromagnetic source and drain electrodes. Thus, the Landauer transmission matrix, traditionally evaluated to obtain the spin-resolved conductances, also yields the reduced spin density operator allowing us to extract quantum-mechanical measures of the detected electron spin-polarization and spin-coherence, thereby pointing out how to avoid detrimental {\em decoherence} effects on spin-encoded information transport through semiconductor spintronic devices.
dc.description5 pages, 2 color EPS figures; one new figure and discussion of some conceptual issues related to spin-polarization in quantum transport
dc.identifierhttps://arxiv.org/abs/cond-mat/0301614
dc.identifierhttp://arxiv.org/abs/cond-mat/0301614
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/20803
dc.subjectMesoscale and Nanoscale Physics
dc.subjectQuantum Physics
dc.titleEntanglement of Electron Spin and Orbital States in Spintronic Quantum Transport
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