Monday, March 28, 2022

Superfluidity: time crystal model

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UPDATE March 30, 2022: The time crystal model cannot explain the second sound of superfluid helium-4. Our plate model of superfluidity is be...
Saturday, March 26, 2022

Landau's criteria of superfluidity: the model is wrong?

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UPDATE March 30, 2022: The "phonon" and the "roton" of Lev Landau seem to be something like an atom, or a lighter or a h...
Thursday, March 24, 2022

Superfluidity is plates of helium atoms?

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A peculiar phenomenon is that the superfluid phase of helium-4 coexists with the normal fluid phase at temperatures 0 K < T < 2.17 K. ...
Sunday, March 20, 2022

Superconductivity is two "crystals" sliding within each other?

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The Wikipedia page states that it is imperfections in the lattice of atoms which causes resistance in a normal metal. https://en.wikipedia.o...
Monday, March 14, 2022

What are Cooper pairs? Time crystals?

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The Physics Stackexchange contains varying descriptions of Cooper pairs. Do they consist of electrons, or of dressed electrons, or are they ...
Saturday, March 12, 2022

The Fermi gas: why we can ignore the repulsion of electrons in a superconductor

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UPDATE March 14, 2022: Our reasoning about destructive interference of scattered waves from random collisions was erroneous. If we sum rando...
Thursday, March 10, 2022

A classical Pauli exclusion principle for electrons

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Let us consider the following model. We have a 2-dimensional plate with a uniform positive electric charge density. We put electrons close t...