According to a recent study from the University of Helsinki, published in the journal Physical Review Letters, a vortex of a superfluid that has been quantized four times has three ways of dividing, depending on the temperature.
The fluid transforms into a superfluid near the absolute zero point of temperature (approximately −273°C). Internal resisting forces, such as friction, disappear. At this point, the behavior of the fluid can no longer be described using classical mechanics; instead, quantum physics must be applied.
When a superfluid is spun, the resulting rotation should never slow down because superfluids have no viscosity or friction. This has been experimented with at the atomic level using helium at very slow rotation, and it was observed that the superfluid, however, eventually halted.
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