New techniques and refinements of older ones are needed to reach <1 K for quantum-computing cooling. Part 1 provided an ...

Recent physics studies have found that light can sometimes flow in unexpected ways, behaving like a so-called "superfluid." Superfluids, such as ultracold atomic gases or helium-4 below specific ...

Conventional helium production comes with enormous carbon emissions, so scientists are looking for alternatives in places like Yellowstone, Tanzania's Rukwa Rift and India's Bakreswar-Tantloi ...

Scientists have controlled Kelvin waves in superfluid helium-4, using electric fields and nanoparticles to visualize them, advancing quantum fluid research.

Taking inspiration from F. Bloch’s seminal work (PRA 7, 2187 (1973)), we investigate the quantum many-body states of superfluid 4He, unveiling a novel characteristic in the system’s energy levels.

Neutron reflectometry has provided researchers with a deeper understanding of how a drop of quantum fluid can prevent liquid helium from flowing uphill and escaping from open containers. Liquid 4 He ...

Microscopic picture of superfluid helium-4 作者： 余永乐 1 罗海林 2 作者单位： ...

What is superfluid 3 He, and why does it warrant investigation? Helium-3 is one of the two stable isotopes of helium. Helium-4 is the stuff that you put in balloons, while helium-3 is rare and can in ...

Many quantum fluids, such as superfluid helium-4, can be considered a mixture of two miscible fluid components: an inviscid superfluid and a viscous normal fluid of thermal quasiparticles. A ...

But if your tea is superfluid helium-4, then these interactions can’t happen. Stir the cup and the vortex should last forever.