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DrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.

I think that a wealth of this kind of experiments has been performed and published as the understanding of the breakdown of...

Oct 5, 2025
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DrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.

I had a look at your draft. In steady state, there will be an influx of Cooper pairs into the non-SC chamber and a reflux of electrons...

Oct 2, 2025
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DrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.

The pairs are in a condensate and the whole condensate has to be accelerated. The acceleration of the condensate is due to the electric...

Oct 1, 2025
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DrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.

This is a thermodynamical argument, not an argument about violation of conservation of momentum. So I think we can agree on that there...

Sep 29, 2025
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DrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.

This is a thermodynamical argument, not an argument about violation of conservation of momentum. So I think we can agree on that there...

Sep 29, 2025
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DrDu replied to the thread I Instantaneous dipole moment and orbitals.

When talking about London forces, you always need at least two atoms. Their dipole dipole interaction involves the product of the dipole...

Sep 29, 2025
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DrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.

The collision of the normal conducting electrons with the lattice preserves (angular) momentum. It is first carried by the electrons...

Sep 29, 2025
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DrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.

Of course the normal conducting electrons will slow down due to collisions with the lattice atoms. Normal resistivity. Where is the...

Sep 28, 2025
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DrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.

I really think there is a very small transient decrease of supercurrent, if you suddenly decrease the superconducting density by...

Sep 27, 2025
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DrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.

Found this interesting article: https://arxiv.org/pdf/1609.08451

Sep 26, 2025
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DrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.

In principle, this is the Einstein - de Haas effect. The electronic sub-system condenses into a broken symmetry state with...

Sep 25, 2025
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DrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.

There is no momentum conservation for the electrons alone. Momentum can always be taken up from or given to the lattice.

Sep 25, 2025
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DrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.

Breaking a pair reduces the magnetic field which leads to an electric field which speeds up the other Cooper pairs which increase the...

Sep 25, 2025
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DrDu replied to the thread Why does having 8 valence electrons make an element inert?.

For me it works fine. For legal reasons I find it problematic to upload papers I do not own.

Sep 19, 2025
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DrDu replied to the thread Why does having 8 valence electrons make an element inert?.

I looked for bader's electron localisation function and NaCl and found the following paper which seems to support the classical picture...

Sep 19, 2025

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