Quantum interference experiments with large molecules

Author(s)
Olaf Nairz, Markus Arndt, Anton Zeilinger
Abstract

Wave-particle duality is frequently the first topic students encounter in elementary quantum physics. Although this phenomenon has been demonstrated with photons, electrons, neutrons, and atoms, the dual quantum character of the famous double-slit experiment can be best explained with the largest and most classical objects, which are currently the fullerene molecules. The soccer-ball-shaped carbon cages C60 are large, massive, and appealing objects for which it is clear that they must behave like particles under ordinary circumstances. We present the results of a multislit diffraction experiment with such objects to demonstrate their wave nature. The experiment serves as the basis for a discussion of several quantum concepts such as coherence, randomness, complementarity, and wave-particle duality. In particular, the effect of longitudinal (spectral) coherence can be demonstrated by a direct comparison of interferograms obtained with a thermal beam and a velocity selected beam in close analogy to the usual two-slit experiments using light. Œ 2003 American Association of Physics Teachers.

Organisation(s)
External organisation(s)
Paracelsus Medizinische Privatuniversität (PMU)
Journal
American Journal of Physics
Volume
71
Pages
319-325
No. of pages
7
ISSN
0002-9505
DOI
https://doi.org/10.1119/1.1531580
Publication date
2003
Peer reviewed
Yes
Austrian Fields of Science 2012
103026 Quantum optics
Portal url
https://ucrisportal.univie.ac.at/en/publications/quantum-interference-experiments-with-large-molecules(1d138c89-160c-4f63-8515-8f598c182264).html