Movies and Animations

Quantum-assisted metrology of neutral vitamins in the gas-phase

This video shows how matter-wave interference in the presence of electric and optical fields can be used to determine electronic and optical properties of biomolecules, here specifically of

  • Pro vitamin A: Beta-carotene
  • Vitamin E: Alpha-tocopherol
  • Vitamin K1: Phylloquinone. 

L. Mairhofer, S. Eibenberger, J. P. Cotter, M. Romirer, A. Shayeghi, and M. Arndt 
Angew. Chem. Int. Ed.  54 (2017).



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Real-time single-molecule imaging of quantum interference

We show the dualities of quantum diffraction in a real-time video. The data are recorded with Phthalocyanine Molecules diffracted at a nanomechanical grating (d=100 nm, s=50 nm) and imaged in laser-induced fluorescence (click here for experimental details).

  • Determinism: Schrödinger's wave equation defines the interference fringe pattern with certainty.
  • Randomness: The location of appearance of any particular molecule on the screen is quantum random
  • Delocalization (wave-nature): the delocalized wave-nature of matter is needed to explain the appearance of the fringes,
  • Local particles: On the screen we find well-localized dots, single molecules whose location we can identify with 10 nm accuracy.  

T. Juffmann, A. Milic, M. Müllneritsch, P. Asenbaum, A. Tsukernik, J. Tüxen, M. Mayor, O. Cheshnovsky, M. Arndt

Nature Nanotechnology (DOI:10.1038/nnano.2012.34)

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