Entanglement manifestation in spin resolved electron-electron scattering

O.M. Artamonov, Sergey Samarin, A.N. Vetlugin, I.V. Sokolov, James Williams

    Research output: Contribution to journalArticle

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    Abstract

    © 2015 Elsevier B.V. The polarization vector P of scattered electrons interacting with a polarized target electrons is compared with the entanglement (or non-separability) of the electron states of the interacting electron pair. The separability S is defined as a linear function of the von Neumann entropy. The shapes of the functions P (θ,Ω,φ) and S (θ,Ω,φ) are similar and simultaneously achieve their maximum value at the scattering angle θ values close to 0 and π and simultaneously tend to zero in the case of symmetric scattering at θ ≈ π/2. In the latter case the scattered electrons are described by an asymmetric spin part of the wave function, which by definition corresponds to the spin entangled (S ≈ 0) electron states of the interacting electron pair. Comparison of the model calculation results with experimental results of the spin polarized electron spectroscopy of the ferromagnetic solid shows qualitative agreement. The analytical expression relating polarization and separability of the two interacting particles enables use the measured polarization of scattered electrons for estimation of the spin-entanglement or separability of the two particle systems.
    Original languageEnglish
    Pages (from-to)66-73
    Number of pages8
    JournalJournal of Electron Spectroscopy and Related Phenomena
    Volume205
    Early online date19 Aug 2015
    DOIs
    Publication statusPublished - Nov 2015

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