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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.
1937 – Pyotr Leonidovich Kapitsa and John Frank Allen/Don Misener discover superfluidity [12] [13] 1941 – Lev Davidovich Landau explains superfluidity [14] [15] 1942 – Hannes Alfvén predicts magnetohydrodynamic waves in plasmas [16] 1944 – Lars Onsager publishes the exact solution to the two-dimensional Ising model [17]
Superfluid vacuum theory (SVT), sometimes known as the BEC vacuum theory, is an approach in theoretical physics and quantum mechanics where the fundamental physical vacuum (non-removable background) is considered as a superfluid or as a Bose–Einstein condensate (BEC).
Scientists have officially spotted characteristics of superfluidity (a quantum fluid with zero viscosity) inside a two-dimensional supersolid for the first time.
Richard Phillips Feynman (/ ˈ f aɪ n m ə n /; May 11, 1918 – February 15, 1988) was an American theoretical physicist.He is best known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, and in particle physics, for which he proposed the parton model.
1937 – Muon discovered by Carl David Anderson and Seth Neddermeyer; 1938 – Pyotr Kapitsa: Superfluidity discovered; 1938 – Otto Hahn, Lise Meitner and Fritz Strassmann Nuclear fission discovered; 1938–39 – Stellar fusion explains energy production in stars [citation needed] 1939 – Uranium fission discovered; 1941 – Feynman path ...
1937 – Superfluidity is discovered in helium-4 by Pyotr Kapitsa [55] and independently by John F. Allen and Don Misener. [56] 1937 – Lev Landau introduces Landau theory of phase transitions. 1940-1941 – László Tisza and Landau introduce the two-fluid model for helium. 1941 – Landau introduces the concept of second sound in condensed ...
[28] [68] With further analysis, Cady and McFarland discovered that 1.84% of the gas sample was helium. [ 69 ] [ 70 ] This showed that despite its overall rarity on Earth, helium was concentrated in large quantities under the American Great Plains , available for extraction as a byproduct of natural gas .