Thermodynamic Evidence for Water as a Quantum Mechanical Liquid

[Count Iblis]

http://arxiv.org/abs/1001.4090"

We consider general theoretical models of water and in particular the nature of the motions of the hydrogen nuclei. If the motion of hydrogen nuclei is classical, then the thermodynamic pressure equation of state for heavy water wherein the hydrogen nuclei are deuterons is identical to the pressure equation of state for light water wherein the hydrogen nuclei are protons. Since the experimental thermodynamic phase diagram for light water is clearly measurably different from the experimental thermodynamic phase diagram for heavy water, one may deduce that the motions of hydrogen nuclei are quantum mechanical in nature. This conclusion is in physical agreement with a recent analysis of X-ray, neutron and deep inelastic neutron scattering data.

 

[SpectraCat]

http://arxiv.org/abs/1001.4090"

Cool, but not particularly surprising. The Feynman path integral descriptions of light and heavy water at finite temperatures are certainly quite different, and one can calculate thermodynamic state functions from simulations of FPI's in imaginary time (PIMD). Neat to see it worked out analytically though.

 

[ytuab]

Sorry. I have not yet read this paper completely.

I have one question. The classical proton in this paper does not have "spin" ?
The proton and the neutron has the magnetic moment.
And the 4 pi rotation experiment of the spinning neutron shows the wave nature of the neutron spin.

The proton and the neutron are much heavier than the electron.
So, If the spin angular momentum is as big as about hbar, the spinning speed probably doesn't become faster than the speed of light. (if the spin of the proton is a real rotation.) (The Story of Spin)
The spin angular momentum is the constant. So if the radius of the (spin) rotation changes, the velocity of the proton changes?
Probably no one deny the wave nature of the proton and neutron, I think.
"Classical" in this paper means we use only the Maxwell's law, and don't use the de Broglie's theory?
But we should consider the de Broglie's theory, too?

So the classical proton in this paper doesn't contain the intrinsic movement such as "spin", does it?