Superfluid helium-4 has been well studied as a candidate scintillation detector for neutrinos and dark matter. When charged particles of high kinetic energy impinge into superfluid helium-4, helium ...

Superfluid Helium-4 Whistles Just The Right Tune Date: January 30, 2005 Source: University Of California, Berkeley Summary: University of California, Berkeley, physicists can now tune in to and ...

It's not every day that an experiment whistles at you. Two UC Berkeley physicists got just that treatment as they cooled helium-4 down to two degrees above absolute zero and tried pushing the ...

A new detector sensitive to low-mass dark matter particles too light for current experiments to see has been proposed by physicists in the US. Built around a bath of superfluid helium-4, the device ...

Here we induce these oscillations in superfluid helium-4 (4He) by pushing it through an array of nanometre-sized apertures. The oscillations, which are detected as an audible whistling sound, ...

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 ...

Silicon nanoparticles are attracted to vortices in superfluid helium Date: May 4, 2022 Source: Osaka University Summary: Researchers use silicon nanoparticles to help visualize the coalescence of ...

Gravitational waves from nearby pulsars could be detected using just a few kilograms of superfluid helium-4, according to physicists in the US. Their detector, which is yet to be built, would measure ...

To demonstrate the law in a superfluid, Herdman and colleagues created a computer simulation of helium. The isotope they studied, helium-4, is the same stuff that keeps birthday balloons aloft ...

As if superfluid helium-4 was not strange enough, in 1941 it was also predicted that it should contain an exotic, particle-like excitation – a quasiparticle – called a roton.

Hear the synchronized vibrations from a chorus of more than 4,000 nano-whistles, created when physicists pushed superfluid helium-4 though an array of nanometer-sized holes.