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Superfluid vacuum theory (SVT) is an approach in theoretical physics and quantum mechanics where the physical vacuum is viewed as superfluid. [citation needed] The ultimate goal of the approach is to develop scientific models that unify quantum mechanics (describing three of the four known fundamental interactions) with gravity.
Fermionic condensates are attained at lower temperatures than Bose–Einstein condensates. Fermionic condensates are a type of superfluid.As the name suggests, a superfluid possesses fluid properties similar to those possessed by ordinary liquids and gases, such as the lack of a definite shape and the ability to flow in response to applied forces.
For example, d-wave or triplet superconductor, or a Fulde–Ferrell–Larkin–Ovchinnikov superconductor. Ferromagnetic superconductor: Materials that display intrinsic coexistence of ferromagnetism and superconductivity. Charge-4e superconductor: A proposed state in which electrons are not bound as Cooper pairs but as quadruplets of electrons.
Superfluid vacuum theory; Superfluidity; Superglass; T. Two-dimensional quantum turbulence; Two-fluid model; W. Weyl semimetal This page was last edited on 25 March ...
Superfluid helium-4 (helium II or He-II) is the superfluid form of helium-4, an isotope of the element helium. ... (for an example, see Gravity Probe B). ...
For example, at the lambda point there is a sharp increase in heat capacity, as it is continued to be cooled, the heat capacity begins to decrease with temperature. [14] In addition, the thermal conductivity is very large, contributing to the excellent coolant properties of superfluid helium. [15]
Close to absolute zero, some liquids form a second liquid state described as superfluid because it has zero viscosity (or infinite fluidity; i.e., flowing without friction). This was discovered in 1937 for helium , which forms a superfluid below the lambda temperature of 2.17 K (−270.98 °C; −455.76 °F).
These are used to explore the transition between a superfluid and a Mott insulator. [60] They are also useful in studying Bose–Einstein condensation in fewer than three dimensions, for example the Lieb–Liniger model (an the limit of strong interactions, the Tonks–Girardeau gas) in 1D and the Berezinskii–Kosterlitz–Thouless transition ...