What's new inHYPERFINITE FACTORS, PADIC LENGTH SCALE HYPOTHESIS, AND DARK MATTER HIERARCHYNote: Newest contributions are at the top! 
Year 2018 
Superfluids dissipate!People in Aalto University  located in Finland by the way  are doing excellent work: there is full reason to be proud! I learned from the most recent experimental discovery by people working in Aalto University from Karl Stonjek. The title of the popular article is Friction found where there should be none—in superfluids near absolute zero. In rotating superfluid one has vortices and they should not dissipate. The researchers of Aalto University however observed dissipation: the finding by J. Mäkinen et al is published in Phys Rev B. Dissipation means that they lose energy to environment. How could one explain this? What comes in mind for an inhabitant of TGD Universe, is the hierarchy of Planck constants h_{eff} =n×h labelling a hierarchy of dark matters as phases of ordinary matter. The reduction of Planck constant h_{eff} liberates energy in a phase transition like manner giving rise to dissipation. This kind of burst like liberation of energy is mentioned in the popular article ("glitches" in neutron stars). I have already earlier proposed an explanation of fountain effect of superfluidity in which superfluid flow seems to defy gravity. The explanation is in terms of large value of h_{eff} implying delocalization of superfluid particles in long length scale (see this). Remark: Quite generally, binding energies are reduced as function of h_{eff}/h= n. One has 1/n^{2} proportionality for atomic binding energies so that atomic energies defined as rest energy minus binding energy indeed increase with n. Interestingly, dimension 3 of space is unique in this respect. Harmonic oscillator energy and cyclotron energies are in turn proportional to n. The value of n for molecular valence bonds depends on n and the binding energies of valence bonds decrease as the valence of the atom with larger valence increases. One can say that the valence bonds involving atom at the right end of the row of the periodic table carry metabolic energy. This is indeed the case as one finds by looking the chemistry of nutrient molecules. The burst of energy would correspond to a reduction of n at the flux tubes associated with the superfluid. Could the vortices decompose to smaller vortices with a smaller radius, maybe proportional to n? I have proposed similar mechanism of dissipation in ordinary fluids for more than two decades ago. Could also ordinary fluids involve hierarchy of Planck constants and could they dissipate in the same manner? In biology liberation of metabolic energy  say in motor action  would take place in this kind of "glitch". It would reduce h_{eff} resources and thus the ability to generate negentropy: this leads to smaller negentropy resources and one gets tired and thinking becomes fuzzy. See the chapter Quantum criticality and dark matter.

Condensed matter simulation of 4D quantum Hall effect from TGD point of viewThere is an interesting experimental work related to the condensed matter simulation of physics in spacetimes with D=4 spatial dimensions meaning that one would have D=1+4=5dimensional spacetime (see this and this). What is simulated is 4D quantum Hall effect (QHE). In Mtheory D= 1+4dimensional branes would have 4 spatial dimensions and also 4D QH would be possible so that the simulation allows to study this speculative higherD physics but of course does not prove that 4 spatial dimensions are there. In this article I try to understand the simulation, discuss the question whether 4 spatial dimensions and even 4+1 dimensions are possible in TGD framework in some sense, and also consider the general idea of the simulation higherD physics using 4D physics. This possibility is suggested by the fact that it is possible to imagine higherdimensional spaces and physics: maybe this ability requires simulation of highD physics using 4D physics. See the chapter Quantum Hall effect and Hierarchy of Planck Constants or the article Condensed matter simulation of 4D quantum Hall effect from TGD point of view.

Excitonpolariton BoseEinstein condensate at room temperature and heff hierarchyUlla gave in my blog a link to a very interesting work about BoseEinstein condensation of quasiparticles known as excitonpolaritons. The popular article tells about a research article published in Nature by IBM scientists. BoseEinstein condensation happens for excitonpolaritons at room temperature, this temperature is four orders of magnitude higher than the corresponding temperature for crystals. This puts bells ringing. Could h_{eff}/h=n be involved? One learns from Wikipedia that excitonpolaritons are electron hole pairs photons kick electron to higher energy state and exciton is created.These quasiparticles would form a BoseEinstein condensate with large number of particles in ground state. The critical temperature corresponds to the divergence of Boltzmann factor given by BoseEinstein statistics.
Is this possible?
For background see the chapter Criticality and dark matter. 