ELFT HÍRADÓ

[Janos Asboth <asboth.janos AT wigner.mta.hu>]

Meghívó

BME Elméleti Fizika Szeminárium,
szeptember 20. péntek 10h15,
BME Elméleti Fizika Tanszék szemináriumi szoba

Ódor Géza (MFA, Complex Systems Group):

Robustness of Griffiths effects in brain models

Recent experimental evidence suggests, that our brain operates near
criticality, where spatial and temporal correlations diverge, a dynamics,
that enhances the brain information-processing capabilities, increasing
sensitivity and optimizing the dynamic range. It might be the case that the
brain tunes itself near criticality
via self-organization, or alternatively, could benefit from the same
properties if sufficient heterogenities (that is disorder) are present to
induce an extended semi-critical region, known as Griffiths Phase. In the
entire Griffiths Phase, which is an extended control parameter region
around the critical point, fluctuations diverge and auto-correlations
exhibit fat tailed, power-law behavior.
I provide numerical evidence for the robustness of the Griffiths Phase in
dynamical threshold model simulations on a large human brain network with
N=836733 connected nodes [1,2,3].

[1] G. Odor and M. Gastner, Sci. Rep. 6, (2016) 27249.
[2] G. Odor, Phys. Rev. E 94, (2016) 062411.
[3] G. Odor, Phys. Rev. E 99, (2019) 012113.

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Asbóth János
szemináriumi koordinátor