Wissenschaftler haben den verborgenen „Randzustand“ entdeckt, der zu praktisch unendlicher Energie führen kann

https://www.popularmechanics.com/science/a62121695/edge-state-atoms-energy-transmission/

3 Comments

  1. > One of the hardest things about exploring the quantum world is that many of the phenomena in this “invisible” realm occur at mind-bogglingly small scales.

    > Take, for example, what is known as the quantum Hall effect. First discovered in 1980 by German physicist Klaus von Klitzing, this effect describes the behavior of electrons (under the influence of a magnetic field and approaching absolute zero temperatures) as they pass through 2D materials, such as graphene. Usually, you’d expect the electrons to experience resistance and scatter, but under these conditions, they formed lossless energy states locked along the material’s boundary.

    > This quantization of electrical resistance, known as an “edge state,” is particularly useful if you want to create exotic materials free of electrical resistance. But there’s just one problem. “These states occur over femtoseconds, and across fractions of a nanometer, which is incredibly difficult to capture.”

    > Now, scientists at MIT have created an experimental set-up that recreates the quantum Hall effect, but uses ultracold cloud of sodium atoms instead of electrons.

    > According to the researchers, this allowed the team to watch these edge states form “over milliseconds and microns,” which are much more manageable experimental parameters. The results of the study were published last week in the journal Nature Physics.

    > “There is no friction. There is no slowing down, and no atoms leaking or scattering into the rest of the system. There is just beautiful, coherent flow.”

    > To test these atoms’ resistances, the team then placed obstacles—such as a point of light—in their paths, and the atoms passed by without any measurable resistance.

  2. Wow. That’s actually a brilliant experiment. Kudos.

    Edit: I want to reiterate how genius I actually think this is. Wow.

  3. maurymarkowitz on

    Has literally nothing whatsoever to do with “practically infinite energy” and the article makes no such claim at all.

    More trashy clickbait.

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