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Isotope-induced partial localization of core electrons in the homonuclear molecule N2

Author

Listed:
  • Daniel Rolles

    (Fritz-Haber-Institut der Max-Planck-Gesellschaft)

  • Markus Braune

    (Fritz-Haber-Institut der Max-Planck-Gesellschaft)

  • Slobodan Cvejanović

    (Fritz-Haber-Institut der Max-Planck-Gesellschaft
    University of Rijeka)

  • Oliver Geßner

    (Fritz-Haber-Institut der Max-Planck-Gesellschaft
    National Research Council Canada)

  • Rainer Hentges

    (Fritz-Haber-Institut der Max-Planck-Gesellschaft)

  • Sanja Korica

    (Fritz-Haber-Institut der Max-Planck-Gesellschaft)

  • Burkhard Langer

    (Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie
    Universität Würzburg)

  • Toralf Lischke

    (Fritz-Haber-Institut der Max-Planck-Gesellschaft
    Tohoku University)

  • Georg Prümper

    (Fritz-Haber-Institut der Max-Planck-Gesellschaft
    Tohoku University)

  • Axel Reinköster

    (Fritz-Haber-Institut der Max-Planck-Gesellschaft)

  • Jens Viefhaus

    (Fritz-Haber-Institut der Max-Planck-Gesellschaft)

  • Björn Zimmermann

    (California Institute of Technology
    Max-Planck-Institut für Physik komplexer Systeme)

  • Vincent McKoy

    (California Institute of Technology)

  • Uwe Becker

    (Fritz-Haber-Institut der Max-Planck-Gesellschaft)

Abstract

Because of inversion symmetry and particle exchange, all constituents of homonuclear diatomic molecules are in a quantum mechanically non-local coherent state; this includes the nuclei and deep-lying core electrons. Hence, the molecular photoemission can be regarded as a natural double-slit experiment1: coherent electron emission originates from two identical sites, and should give rise to characteristic interference patterns2. However, the quantum coherence is obscured if the two possible symmetry states of the electronic wavefunction (‘gerade’ and ‘ungerade’) are degenerate; the sum of the two exactly resembles the distinguishable, incoherent emission from two localized core sites. Here we observe the coherence of core electrons in N2 through a direct measurement of the interference exhibited in their emission. We also explore the gradual transition to a symmetry-broken system of localized electrons by comparing different isotope-substituted species—a phenomenon analogous to the acquisition of partial ‘which-way’ information in macroscopic double-slit experiments3.

Suggested Citation

  • Daniel Rolles & Markus Braune & Slobodan Cvejanović & Oliver Geßner & Rainer Hentges & Sanja Korica & Burkhard Langer & Toralf Lischke & Georg Prümper & Axel Reinköster & Jens Viefhaus & Björn Zimmerm, 2005. "Isotope-induced partial localization of core electrons in the homonuclear molecule N2," Nature, Nature, vol. 437(7059), pages 711-715, September.
  • Handle: RePEc:nat:nature:v:437:y:2005:i:7059:d:10.1038_nature04040
    DOI: 10.1038/nature04040
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