Tag Archives: physics

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Graphene joins the race to redefine the ampere

  • Graphene joins the race to redefine the ampere - A new joint innovation by the National Physical Laboratory and the University of Cambridge could pave the way for redefining the ampere in terms of fundamental constants of physics. The world's first graphene single-electron pump, described in a paper today in Nature Nanotechnology, provides the speed of electron flow needed to create a new standard for electrical current based on electron charge.(10.1038/nnano.2013.73)
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    New methods for cooling of ions developed

    New methods for cooling of ions developed - Among the most important techniques developed in atomic physics over the past few years are methods that enable the storage and cooling of atoms and ions at temperatures just above absolute zero. Scientists have now demonstrated in an experiment that captured ions can also be cooled through contact with cold atoms and may thus be stored in so-called ion traps in a stable condition for longer periods of time. This finding runs counter to predictions that ions would actually be heated through collisions with atoms.(10.1038/ncomms2131)

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    Neutron experiments give unprecedented look at quantum oscillations

    Neutron experiments give unprecedented look at quantum oscillations - Researchers at ORNL have found that nitrogen atoms in the compound uranium nitride exhibit unexpected, distinct vibrations that form a nearly ideal realization of a physics textbook model known as the isotropic quantum harmonic oscillator.(10.1038/ncomms2117)

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