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Decoherence of matter waves by thermal emission of radiation

Author

Listed:
  • Lucia Hackermüller

    (Universität Wien)

  • Klaus Hornberger

    (Universität Wien)

  • Björn Brezger

    (Universität Wien
    Universität Konstanz)

  • Anton Zeilinger

    (Universität Wien)

  • Markus Arndt

    (Universität Wien)

Abstract

Emergent quantum technologies have led to increasing interest in decoherence—the processes that limit the appearance of quantum effects and turn them into classical phenomena. One important cause of decoherence is the interaction of a quantum system with its environment, which ‘entangles’ the two and distributes the quantum coherence over so many degrees of freedom as to render it unobservable. Decoherence theory1,2,3,4 has been complemented by experiments using matter waves coupled to external photons5,6,7 or molecules8, and by investigations using coherent photon states9, trapped ions10 and electron interferometers11,12. Large molecules are particularly suitable for the investigation of the quantum–classical transition because they can store much energy in numerous internal degrees of freedom; the internal energy can be converted into thermal radiation and thus induce decoherence. Here we report matter wave interferometer experiments in which C70 molecules lose their quantum behaviour by thermal emission of radiation. We find good quantitative agreement between our experimental observations and microscopic decoherence theory. Decoherence by emission of thermal radiation is a general mechanism that should be relevant to all macroscopic bodies.

Suggested Citation

  • Lucia Hackermüller & Klaus Hornberger & Björn Brezger & Anton Zeilinger & Markus Arndt, 2004. "Decoherence of matter waves by thermal emission of radiation," Nature, Nature, vol. 427(6976), pages 711-714, February.
  • Handle: RePEc:nat:nature:v:427:y:2004:i:6976:d:10.1038_nature02276
    DOI: 10.1038/nature02276
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    Cited by:

    1. Franco Vaio, 2019. "The quantum-like approach to modeling classical rationality violations: an introduction," Mind & Society: Cognitive Studies in Economics and Social Sciences, Springer;Fondazione Rosselli, vol. 18(1), pages 105-123, June.

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