Quantum criticality is one of the corner stone assumptions of TGD. The value
of Kahler coupling strength fixes quantum TGD and is analogous to critical
temperature. TGD Universe would be quantum critical. What does this mean
is however far from obvious and I have pondered the notion repeatedly both
from the point of view of mathematical description and phenomenology. Superfluids exhibit rather mysterious looking effects such as fountain effect and
what looks like quantum coherence of superfluid containers which should be
classically isolated. These findings serve as a motivation for the proposal that
genuine superfluid portion of superfluid corresponds to a large heff phase near
criticality at least and that also in other phase transition like phenomena a
phase transition to dark phase occurs near the vicinity.
Keywords: Planck constant, gravitational Planck constant, effective
Planck constant, effects of ELF em fields on brain, dark
matter, non-determinism, dark matter, quantum criticality, covering
space, fractional quantum Hall effect (FQHE).