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Analysis of lense‐governed Wigner signed particle quantum dynamics (Phys. Status Solidi RRL 7/2017)
Author(s) -
Ellinghaus Paul,
Weinbub Josef,
Nedjalkov Mihail,
Selberherr Siegfried
Publication year - 2017
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201770335
Subject(s) - coherence (philosophical gambling strategy) , physics , quantum , electron , phonon , quantum mechanics , quantum entanglement , scattering , statistical physics , classical mechanics
Quantum coherence is the underlying concept of emerging engineering disciplines such as entangletronics. Electrostatic lenses are used to focus, guide, reshape, or split an electron state into components and thus to provide a coherent manipulation of the electron evolution. Coherence is a fundamental aspect involved in lense‐governed electron dynamics. However, phonon scattering processes strive to counteract coherence and to impose a classical behaviour, i.e., suppress quantum effects. To analyze the interplay of these phenomena, Ellinghaus et al. (article no. 1700102 ) expressed the entanglement‐based, quantifying theory of coherence via the Wigner formalism and established a link to a signed particle model of the evolution of the electron state. This approach enables physically intuitive insights into coherent processes and scattering‐caused transitions to classical dynamics. The figures on the cover show two snapshots of the comparison of the coherent and phonon‐aware evolution of the density of an initial minimum uncertainty electron state hitting the lense (white shape) from the bottom. While the coherent evolution has been already split into two well established peaks, the subtracted phonon‐aware density retards and resembles the point‐like structure of spreading by scattering induced classical diffusion.