Bridging the quantum universe and classic world

  •   Quantum computers have the potential to achieve performance and speed far beyond current HPCs.

      However, as Professor Mario Ruben of the Karlsruhe Institute of Technology (KIT) points out, such machines would also be quite susceptible to external interferences - with information flow in and out of the system ranked as a "critical" point.  

    Fortunately, KIT researchers managed to successfully "read out" the quantum state of an atom directly - simply by using electrodes.  

    "Normally, every contact with the outer world changes information in a quantum mechanical system in a completely uncontrolled manner," explained Ruben.


    According to Ruben, magnetic molecule complexes may present a possible solution as a metal atom with a pronounced magnetic moment - or "spin" - is located in its complex center. Interestingly, the spin is surrounded by organic molecules that shield the atom.

    "When synthesizing this protective enclosure, we can exactly define how much the metal atom sees of the outer world," said the scientist.

    The above-mentioned research is based on a metal atom terbium that was provided with an enclosure of about 100 carbon, nitrogen, and water atoms and subsequently placed in the center of nanometer-sized, electric gold contacts.


    "By measuring current flow, we found that the nuclear spin of the metal atom is stable for up to 20 seconds... For quantum mechanical processes, this is [actually] a very long time." 

    Ruben says he is confident the results will be of particular importance to spintronics and quantum computing.   
