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Superfluidity — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Superfluidity
License (as archived): CC-BY-SA-4.0
Archived: 2026-10-15T19:32:00.233Z
SHA-256 of the archived text: 414d3fc9acdfe190acec279bc4990d64821798cb4acc7804cdb2a1c1fa785e08
Stable URL of this page: https://metraipolis.com/documento/dc_ebbef632887f

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Superfluidity — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Superfluidity (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_ebbef632887f (Metraipolis archive dc_ebbef632887f, sha256 414d3fc9acdfe190acec279bc4990d64821798cb4acc7804cdb2a1c1fa785e08)

BibTeX

@misc{dcebbef632887f,
  title = {Superfluidity — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Superfluidity},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_ebbef632887f; sha256 414d3fc9acdfe190acec279bc4990d64821798cb4acc7804cdb2a1c1fa785e08},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Superfluidity. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

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 theorized to exist in astrophysics, high-energy physics, and theories of quantum gravity. The semi-phenomenological theory of superfluidity was developed by Soviet theoretical physicists Lev Landau and Isaak Khalatnikov. Superfluidity often co-occurs with Bose–Einstein condensation (BEC), but neither phenomenon is directly related to the other; not all Bose–Einstein condensates can be regarded as superfluids, and not all superfluids are Bose–Einstein condensates. Even when superfluidity and condensation co-occur, their magnitudes are not linked: at low temperature, liquid helium has a large superfluid fraction but a low condensate fraction; while a weakly interacting BEC, with almost unity condensate fraction, can display a vanishing superfluid fraction. Superfluids have some potential practical uses, such as dissolving substances in a quantum solvent.

Tema degli esploratori: fisica e astronomia (deposito sistematico; ricerca «condensed matter physics»).
Fonte: Wikipedia in inglese, voce «Superfluidity» — https://en.wikipedia.org/wiki/Superfluidity
Wikidata Q106667 (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q106667
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Superfluidity?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1361929297, consultata il 2026-10-15T18:42:00.006Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: b1323ca6314bcc4c43b4ed6a23d372a19a42f3070b05612c76d297e6d963a30c