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Superfluid 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 helium), … See more
Known as a major facet in the study of quantum hydrodynamics and macroscopic quantum phenomena, the superfluidity effect was … 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 and liquid regions separated by the … See moreSuperfluids, such as helium-4 below the lambda point, exhibit many unusual properties. A superfluid acts as if it were a mixture of a normal component, with all the properties of a … See more
Landau two-fluid approach
L. D. Landau's phenomenological and semi-microscopic theory of superfluidity of helium-4 earned … 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, … See moreWikipedia text under CC-BY-SA license Superfluidity - Wikipedia
Superfluidity is the characteristic property of a fluid with zero viscosity which therefore flows without any loss of kinetic energy. When stirred, a superfluid forms vortices that continue to rotate indefinitely. Superfluidity 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 exotic states of matter
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Superfluidity: the mysterious quantum effect that became a …
WEBFeb 14, 2024 · Learn how superfluid helium, a substance with bizarre and useful properties, has been used in many scientific breakthroughs and technologies. The book …
52.11: Superfluids - Physics LibreTexts
WEBSuperfluid helium II is a quantum liquid, and a complete description of its behavior requires the application of quantum mechanics. 5. Above \(2.17 \mathrm{~K}\), liquid …
Secrets of superfluid helium explored | Department of Physics
WEBUsing a nanofabricated torsion pendulum, they observed the A and B phases of superfluid helium-3 and found a new supercooling effect. They also suggested that intermediate …
Eighty years of superfluidity - Nature
WEBJan 15, 2018 · A review of the history and physics of superfluidity, a phenomenon in which liquid helium-4 and helium-3 flow without friction or viscosity at low temperatures. Learn how superfluidity is related to …
Liquid helium, superfluidity - HyperPhysics
WEBLearn about the properties and applications of liquid helium, a superfluid that forms at 2.17 K. Explore the lambda point, the two-fluid model, and the Bose-Einstein condensation of …
Superfluidity | Physics of Low-Temperature Fluids | Britannica
WEBsuperfluidity, the frictionless flow and other exotic behaviour observed in liquid helium at temperatures near absolute zero (−273.15 °C, or −459.67 °F), and (less widely used) …
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 …
Universal Kibble–Zurek scaling in an atomic Fermi superfluid
WEBJul 29, 2024 · Superfluid phase transitions, with their spontaneously broken global U(1) symmetry, have profound implications in the study of quantum liquids 6.The density of …
Superfluid helium behaves like black holes - Science …
WEBMar 16, 2017 · A computer simulation of superfluid helium reveals that its entanglement entropy grows with the surface area of the system, like black holes. This phenomenon, called the area law, has implications for …
Coulomb Interaction-Driven Entanglement of Electrons on Helium
WEB1 day ago · The computational procedure outlined here can be employed for device design and guidance of experimental implementations. In particular, the theoretical tools …
Superfluid Helium - MIT - Massachusetts Institute of Technology
WEBKey differences of helium superfluidity and BEC: Interactions: He-II is a practically incompressible liquid due to hard-core interactions, while the ideal BEC has no …
WEBA brief account of the physics of superfluid 4He, with emphasis on the underlying physical principles and their connection with Bose condensation and superconductivity. The …
Visualization of two-fluid flows of superfluid helium-4 | PNAS
WEBMar 24, 2014 · Quantum fluids such as superfluid helium show vortical motion through topological defects known as quantized vortices. These line-like quantum objects …
Superfluidity Definition and Examples - Science Notes and Projects
WEBFeb 9, 2022 · Superfluid helium-4 is the best studies example of superfluidity. Helium-4 transitions from a liquid into a superfluid just a few degrees below its boiling point of …
Strange but True: Superfluid Helium Can Climb Walls
WEBFeb 20, 2009 · Superfluid helium's dual nature is at work again when it climbs the walls of a container. (Watch this YouTube video of the effect.) Any liquid will coat the sides of a …
Phys. Rev. A 101, 012336 (2020) - Integrating superfluids with ...
WEBJan 22, 2020 · Superfluid helium's low-loss dielectric properties, excellent thermal conductivity, and unique collective excitations make it an attractive candidate to …
Superfluid Helium - an overview | ScienceDirect Topics
WEBA superfluid is a zero-entropy fluid and does not carry heat. If heat is supplied at some spot into superfluid helium, it must be transported away if the temperature is to remain …
Superfluid Helium Droplets: An Ultracold Nanolaboratory
WEBFeb 1, 2001 · The unique environment in liquid helium droplets opens up new opportunities for molecular spectroscopy and for probing superfluid phenomena on the atomic scale.
How is helium turned into a liquid and a superfluid?
WEBHow is helium turned into a liquid and a superfluid? - BBC Science Focus Magazine.
How Gamma Ray Lasers Could Unlock Interstellar Travel
WEB6 days ago · They successfully encapsulated a bubble of positronium—a collection of atoms that have positrons, antiparticle counterparts to electrons—within superfluid liquid helium.
Preliminary results of antiproton experiment may provide clues in ...
WEB2 days ago · Taken in 2023, these results show preliminary plots of the antiproton's production cross section—the probability that antiprotons are produced when a beam of …
Laser cooling and control of excitations in superfluid helium
WEBApr 4, 2016 · Superfluidity is a quantum state of matter that exists macroscopically in helium at low temperatures. The elementary excitations in superfluid helium have …
Electric and magnetic deflection of fully field-oriented ... - NSF
WEBA "superfluid" is a fluid that can flow without the internal friction or viscosity of liquids. The cold temperature (a fraction of a degree above absolute zero, which is -273.15 degrees …
Quantum computation with electrons trapped on liquid Helium
WEB3 days ago · Surface-state electrons floating on liquid Helium have been served as one of the great potential experimental platforms to implement quantum computation, wherein …
Nazi Party Rally Grounds - Wikipedia
WEBThe Nazi party rally grounds ( German: Reichsparteitagsgelände, literally: Reich Party Congress Grounds) covered about 11 square kilometres (1,100 ha) in the southeast of …
How to Spend 2 Perfect Days in Nuremberg, Bavaria’s Historic City
WEBMay 1, 2023 · Whether you’re a food lover craving hearty Franconian cuisine, a history nerd seeking to immerse yourself in medieval times, or an explorer yearning to uncover the …
10 Museums And Galleries In Nuremberg You Should Visit
WEBFeb 9, 2017 · The charming city is home to a wide range of galleries and museums that explore its turbulent development, as well as showcase local and international artists. …
Zeppelinfeld - All You Need to Know BEFORE You Go (2024)
WEBAvondale, Pennsylvania720 contributions. Great site for WWII History Fans. Visit the location of the famous rallies of the National Socialist Party that were designed by Albert …