An international group of scientists used an unusual "diagnostic" method to determine which quantum phenomena hold electrons in superconductors together.
The same phenomenon can be described in different ways, explained by the authors of the paper, and in order to select the best model from a few possible researchers from the Institute of Solid Body Physics of the Technical University of Vienna as early as 2015, suggested a theoretical method that could be used to determine the best view of the outstanding solid body physics issues.
The authors explain the principles of this method in the following example. The motion of objects in the solar system can be represented from different reference systems. If you put physics in the center of the Earth and identify the remaining objects in relation to it, it becomes very difficult, but if you put the sun in the center of the model, the theoretical description becomes much more elegant and informative.
Scientists have used their approach to study superconductivity in bills, which is a group of complex copper-based compounds related to non-traditional superconductors; electrical resistance in materials such as conventional superconductors drops sharply to zero when cooled below a certain temperature.
In this state, solid body electrons must be paired, despite being pushed back together because of the same charge; this quantum physical phenomenon can be caused by different mechanisms.
In their work, researchers have considered two possible options: spinal and charge fluctuations as the basis for electron communication; these are phenomena associated with the deviation of local spinal density or charge density from its mean value; scientists have shown that only if the interaction is based on spinal fluctuations can a model be created that accurately describes observations.
If you change perspective and focus on charge fluctuations, you get a blurry and essentially useless representation.