Why is there no speed limit in a highly fluid universe

Physicists at the University of Lancaster have established why there is no speed limit to continue previous Lancaster research into objects moving by superfluid helium-3.

Helium-3 is a rare isotope of helium, missing a neutron. It becomes redundant at extremely low temperatures, enabling unusual properties such as lack of friction for moving objects.

It was assumed that the speed of the moving objects by helium-3 was originally limited to critical lando velocities, and that this would destroy excess fluid beyond the speed limit. Previous experiments with Lancaster have found that it is not a strict rule and that objects can move faster without destroying the delicate excess fluid.

Scientists at the University of Lancaster have now discovered the cause of the absence of motion limits: strange particles that stick to all surfaces of excess fluid.

Discovery can guide applications in quantum technology .G, but also in quantum computing, where many research groups already aim to use these unusual particles.

To shake the visually bound particles, the researchers cooled the highly liquid helium-3 from absolute zero (0.0001 K or -273.15 ° C) to one tenth of a degree. They then moved the wire through the excess fluid at excessive speed, and measured how much force was needed to move the wire. The measured force was zero, except for a very small force related to moving the bound particles around when the wire began to move.

Leading author Dr. Sam. “Superfluid helium-3 looks like a vacuum from a burning rod, although it is a relatively liquid liquid. There is no resistance, not at all. I find this very interesting,” said Samuli.

Ph.D. Student Ash Jennings added: “By changing the direction of the rod’s motion, we were able to conclude that the rod would be obscured by excessive liquid by bound particles covering it, even though its speed was very high.” “Bound particles initially need to move around to achieve this, and it brings a small force to the rod, but once this is done, the force just disappears completely,” said Dr. Dmitry Zmayev of the project. Monitors.

The Lancaster researchers included Samuli Tti, Sean Ahlstrom, Richard Haley, Ash Jennings, George Pickett, Malcolm Poole, Roach Scannan, Victor Tspalin, Jakub Wonka, Tom Wilcox, Rewandru Woods and Dimmy. The results are published in Nature Communications.