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STRONGER AND FASTER THAN LIGHTING: SCIENTIST ACHIEVE RARE QUANTUM STATE IN POLYCRYSTALS

 Scientists from the Max Planck Institute for Polymer Research, Paderborn University, and the University of Konstanz have succeeded in achieving a rare quantum state. They are the first to have demonstrated Wannier-Stark localization in a polycrystalline substance. Predicted around 80 years ago, the effect has only recently been proven — in a monocrystal. Until now, researchers assumed this localization to be possible only in such monocrystalline substances which are very complicated to produce. The new findings represent a breakthrough in the field of physics and could in future give rise to new optical modulators, for example, that can be used in information technologies based on light, among other things. The physicists have published their findings in the well-respected technical journal, Nature Communications.

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The atoms of a crystal are arranged in a three-dimensional grid, held together by chemical bonds. These bonds can, however, be dissolved by very strong electric fields which displace atoms, even going so far as to introduce so much energy into the crystal that it is destroyed. This is what happens when lightning strikes and materials liquefy, vaporize or combust, for example. To demonstrate Wannier-Stark localization, the scientists’ experiments involved setting up electric fields of several million volts per centimeter, much stronger than the fields involved in lightning strikes.

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STRONGER AND FASTER THAN LIGHTNING

Simulations prove the conjecture:


"Despite the random orientation of the individual crystallites, the small building blocks within the polycrystal, we were able to observe clear results that correspond to the characteristics of Wannier-Stark localization," Kim continues. Simulations carried out in Paderborn subsequently confirmed these findings. Meier explains: "Although the sample is polycrystalline, it appears that the field-induced changes in optical characteristics are dominated by a particular orientation between the crystallites and the electric field."





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  1. Cultura Científica J and A19 de mayo de 2022, 1:14

    I found it interesting to read this news since it has helped me to know what polymers were and the new research that is being opened in this field.
    Alejandra López

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