Metastable helium: Atom optics with nano-grenades

Kenneth G.H. Baldwin*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    55 Citations (Scopus)

    Abstract

    In this, the hundredth year since Einstein first postulated the existence of photons, the successful application of wave-particle duality to matter has seen an explosion of activity in the field of atom optics and Bose- Einstein condensation (BEC). This article provides a brief introduction to atom optics, illustrated with applications taken from experiments using helium atoms in long-lived (metastable) excited states. Metastable helium atoms store the greatest amount of energy (∼20 electron volts) in any atomic or molecular system. They behave like nano-hand grenades, making it easy to detect single atoms, opening up promising applications as well as fundamental studies of the quantum statistical properties of atomic systems.

    Original languageEnglish
    Pages (from-to)105-120
    Number of pages16
    JournalContemporary Physics
    Volume46
    Issue number2
    DOIs
    Publication statusPublished - Mar 2005

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