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j.gal
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Why do helium-3 and helium-4 have different lambda points?
It is more wonderful that both heliums can be superfluid!j.gal said:Why do helium-3 and helium-4 have different lambda points?
M@2 said:Minich explained me, that such structure is zero phonon modes in he4. Those phonon zero modes in he4 are similar to he3 atoms and are similar to fermion-like particles. The number of those modes in he4 is 3*(number of he4 atoms).
Superfluidity is a phenomenon observed in certain materials, such as liquid helium, at extremely low temperatures near absolute zero. It is characterized by the complete absence of viscosity and the ability to flow without any resistance.
Helium-3 and helium-4 are two isotopes of the element helium. The main difference between them is their atomic structure, with helium-3 having one less neutron in its nucleus compared to helium-4. This small difference in structure leads to significant differences in their physical properties, such as superfluidity.
At very low temperatures, helium-4 atoms undergo a phase transition, forming a Bose-Einstein condensate where all of the atoms occupy the same quantum state. This allows them to flow without any resistance, exhibiting superfluidity.
Yes, helium-3 can also exhibit superfluidity, but at even lower temperatures compared to helium-4. This is because the atoms in helium-3 are fermions, which have a different type of quantum behavior compared to the bosons in helium-4.
Superfluid helium has several practical applications in fields such as cryogenics, quantum computing, and particle physics. It is also used in various scientific experiments, such as studying the behavior of matter at extremely low temperatures and testing theories of quantum mechanics.