Tag Archive for 'Superfluidity'

Fore et al. study neutron star crusts by simulating neutron matter then adding ‘hidden’ neutrons to mediate interactions between ‘real’ neutrons; next, neural networks construct a quantum wave function of neutron matter’s normal and superfluid phases. Image credit: Jane Kim, Ohio University.

Physicists Find Evidence for Superfluidity in Low-Density Neutron Matter

Nov 11, 2024 by News Staff

An accurate description of low-density nuclear matter is crucial for explaining the physics of neutron star crusts, according to a team of theoretical...

Experimental set-up. Quartz-glass sample container cylinder is filled partially with superfluid 3He-B, leaving a free surface of the superfluid approximately 3 mm above the centre of the surrounding coil system. The space above the free surface is vacuum due to the vanishing vapor pressure of 3He at sub-millikelvin temperatures. Magnons can be trapped in this configuration in two separate locations, in the bulk (colored blue) and touching the free surface (colored red). Transverse NMR coils are used both for RF pumping of magnons into the BECs, and for recording the induced signal from the coherently precessing magnetization M (light yellow arrow). The amplitude of the recorded signal is proportional to βM, the tipping angle of M, and its frequency corresponds to the precession frequency of the condensate. The condensates are trapped by the combined effect of the distribution of the orbital anisotropy axis of the superfluid (green arrows) via spin-orbit coupling, and a minimum of the external magnetic field created using a pinch coil (magenta wire loop). The external field H is oriented along the z axis of the sample container. Image credit: Autti et al, doi: 10.1038/s41563-020-0780-y.

Physicists Observe Quantum Time Crystals Interacting with Each Other

Aug 18, 2020 by News Staff

An international team of physicists has studied the controlled interaction of two spatially separated time crystals. Experimental set-up. Quartz-glass...

Schematic of the organic microcavity used to observe superfluid flow. Image credit: Polytechnique Montreal.

Superfluid Motion of Light Observed at Room Temperature

Jun 9, 2017 by News Staff

An international team of physicists has experimentally demonstrated that superfluid motion of light is possible under ambient conditions. Until now, this...

Entanglement across a spherical boundary: a container of superfluid helium-4 is bipartitioned into a sphere of helium atoms A (green) and its complement A- (blue). The entanglement between A and A- is dominated by an area law, scaling with area of the bounding surface. Image credit: C.M. Herdman et al, doi: 10.1038/nphys4075.

Sphere of Superfluid Helium Behaves Like Black Hole, Physicists Say

Mar 23, 2017 by News Staff

A team of physicists from the Universities of Vermont and Waterloo has discovered that a sphere of cold helium atoms follows a bizarre law of physics —...

This artist’s concept depicts a pulsar called PSR B1257+12 and three exoplanets (discovered by Aleksander Wolszczan in 1992) orbiting around it. Image credit: NASA / JPL-Caltech.

Astronomers Develop New Method for Measuring Mass of Young Pulsars

Oct 6, 2015 by News Staff

A team of astronomers from Chile, the United Kingdom, and the Netherlands, has found a new, highly accurate way to measure the mass of young pulsars. This...