Physicists calculated quantum yield stress of liquids

The yield stress of liquids, subject to the laws of quantum mechanics, was revealed by physicists from Queen Mary University of London (QMUL Great Britain) and the Institute of High Pressure Physics (Troitsk, Moscow). An article with the results of this study was published in the scientific journal Science Advances. British physicist Constantine Trachenko and academic from Troitsk Vadim Brezhkin determined that for liquids even having different viscosity as syrup or ketchup, there is a theoretical limit of viscosity, the same for any liquids. Using the quantum method, physicists made calculations that showed that the minimum viscosity or maximum fluidity of any fluid depends on only two fundamental constants: Planck constant and proton-electron mass ratio. All other material properties, including molecular composition, did not affect these parameters. Scientists note that the theoretical yield stress found does not refer to exotic liquids such as Bose-Einstein condensate or ultra-fluid liquid helium. These substances behave not as water, or similar liquids, but as a single quantum object. At the same time, this limit works equally for all variations of the classical aggregate form of matter, of which water is the reference. The authors of the study note that this discovery imposes theoretical limits on the limits of possible in completely different fields of physics, using the properties of fluidity or viscosity of liquids, up to the physics of black holes or plasma, arising at ultra-high pressures and temperatures.