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See all on WikipediaSuperfluid helium-4 - Wikipedia
Superfluid helium-4 (helium II or He-II) is the superfluid form of helium-4, an isotope of the element helium. A superfluid is a state of matter in which matter behaves like a fluid with zero viscosity. The substance, which resembles other liquids such as helium I (conventional, non-superfluid liquid … See more
Known as a major facet in the study of quantum hydrodynamics and macroscopic quantum phenomena, the superfluidity effect was discovered by Pyotr Kapitsa and See more
Recently in the field of chemistry, superfluid helium-4 has been successfully used in spectroscopic techniques as a quantum solvent See more
Thermodynamics
Figure 1 is the phase diagram of He. It is a pressure-temperature (p-T) diagram indicating the solid … See more
Superfluids, such as helium-4 below the lambda point, exhibit many unusual properties. A superfluid acts as if it were a mixture of a normal … See more
Landau two-fluid approach
L. D. Landau's phenomenological and semi-microscopic theory of superfluidity of helium-4 earned him the Nobel Prize in physics, in 1962. … See more• Antony M. Guénault: Basic superfluids. Taylor & Francis, London 2003, ISBN 0-7484-0891-6
• D.R. Tilley and J. Tilley, Superfluidity and Superconductivity, (IOP Publishing Ltd., … See moreWikipedia text under CC-BY-SA license Helium-4 - Wikipedia
Helium-4 ( He ) is a stable isotope of the element helium. It is by far the more abundant of the two naturally occurring isotopes of helium, making up about 99.99986% of the helium on Earth. Its nucleus is identical to an alpha particle, and consists of two protons and two neutrons.
Alpha decay of heavy elements in the Earth's crust is the source of most naturally occurring helium-4 on Earth, produced after the planet cooled and solidified. While it is also produced byWikipedia · Text under CC-BY-SA license- Estimated Reading Time: 8 mins
Eighty years of superfluidity - Nature
WEBJan 15, 2018 · At sufficiently low temperatures, helium-4 atoms undergo Bose–Einstein condensation and become a superfluid. Similarly, in the …
- Author: William P. Halperin
- Publish Year: 2018
Superfluidity: the mysterious quantum effect that became a …
WEBFeb 14, 2024 · The strange properties of superfluid helium-4 (also known as liquid helium II) arise because of the quantum rules governing the symmetry of the wave functions of …
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WEBComprehensive tables of the primary thermodynamic properties of superfluid helium-4, such ~s the specific heat and entropy. are presented as computed from the Landau …
Superfluidity - Wikipedia
WEBSuperfluidity occurs in two isotopes of helium (helium-3 and helium-4) when they are liquefied by cooling to cryogenic temperatures. It is also a property of various other …
Visualization of two-fluid flows of superfluid helium-4
WEBMar 24, 2014 · Quantum fluids such as superfluid helium show vortical motion through topological defects known as quantized vortices. These line-like quantum objects cross, exchange tails, and separate, exciting …
Imaging quantized vortex rings in superfluid helium to ... - Nature
WEBMay 23, 2023 · Here we report a visualization study of quantized vortex rings propagating in superfluid helium. By examining how the vortex rings spontaneously decay, we provide …
Physics - How could a solid be superfluid?
WEBAug 25, 2008 · Experiments indicate that, as in a superfluid, mass can flow through solid helium-4 without viscous resistance. Recent calculations shed light on how this may happen thanks to defects in the crystal lattice.
Supersolid helium | Nature
WEBJan 15, 2004 · At temperatures below 2.176 K, helium-4 enters a superfluid state and flows without friction. This 'perpetual motion' makes superfluidity — perhaps even more than …
Strange but True: Superfluid Helium Can Climb Walls
WEBFeb 20, 2009 · In superfluid helium, the frictionless film slithers over the whole container, creating a sort of arena through which the superfluid can flow. If the liquid has …
Superfluid helium: the quantum curiosity that enables huge …
WEBMay 6, 2024 · Helium-4 is a boson and bosonic atoms are able to condense into the lowest quantum energy state of the system, creating a superfluid. Helium-3 atoms are not …
WEBThe paper contains a brief account of the physics of superfluid 4He, with em-phasis on the underlying physical principles; it uses the minimum of mathe-matics, and there is some …
WEBCryogenic flow visualization techniques have been proved in recent years to be a very powerful experimental method to study superfluid turbulence. Micron-sized solid …
Wild Experiment Reveals What Would Happen if You Touched
WEBNov 2, 2023 · An experiment has finally revealed how it might feel to touch a quantum superfluid. Physicists dunked a special, finger-sized probe into an isotope of helium …
Superfluid helium-4 hydrodynamics with discrete topological defects
WEBOct 8, 2018 · In superfluid helium-4, a model of normal-fluid hydrodynamics and their coupling with topological defects (quantized vortices) of the order parameter (superfluid) …
Superfluid Helium Droplets: An Ultracold Nanolaboratory
WEBFeb 1, 2001 · Superfluid Helium Droplets: An Ultracold Nanolaboratory. The unique environment in liquid helium droplets opens up new opportunities for molecular …
Quantum whistling in superfluid helium-4 | Nature
WEBJan 26, 2005 · Here we induce these oscillations in superfluid helium-4 ( 4 He) by pushing it through an array of nanometre-sized apertures. The oscillations, which are detected as …
Superfluidity Within a Small Helium-4 Cluster: The Microscopic
WEBIn the helium-4 droplets, sharp rotational lines were observed, whereas in helium-3 only a broad peak was found. This difference is interpreted as evidence that the narrow …
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Theory for superfluid helium confirmed | ScienceDaily
WEBJul 17, 2023 · A new study of vortex ring motion in superfluid helium provides crucial evidence supporting a recently developed theoretical model of quantized vortices.
The calculated thermodynamic properties of superfluid helium‐4
WEBJan 1, 1977 · Comprehensive tables of the primary thermodynamic properties of superfluid helium‐4, such as the specific heat and entropy, are presented as computed from the …
52.11: Superfluids - Physics LibreTexts
WEB52.11: Superfluids. Page ID. When liquid helium-4 ( 4He 4 H e ) is cooled below a critical temperature of 2.17 K 2.17 K (called the lambda point), a sudden phase transition …
Coulomb Interaction-Driven Entanglement of Electrons on Helium
WEB2 days ago · The computational procedure outlined here can be employed for device design and guidance of experimental implementations. In particular, the theoretical tools …
High-resolution laser resonances of antiprotonic helium in …
WEBMar 16, 2022 · Here we show that when an exotic helium atom with a constituent antiproton7–9 is embedded into superfluid helium, its visible-wavelength spectral line …
Quantum computation with electrons trapped on liquid Helium
WEB3 days ago · Let us consider a planar chip schematically shown in Fig. 1, wherein a series of electrons are trapped individually on liquid Helium and thus generate a trapped electron …
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