arXiv subjects

Myron Kampitakis

Publications and source records attributed to Myron Kampitakis.

5 recordsLinked to original sources

arXiv2019

Applying the Method of Critical Fluctuations on Human Electrocardiograms

In this work we apply the Method of Critical Fluctuations (MCF)on human Electrocardiogram (ECG) time-series. The method is able to reveal critical characteristics, in terms of physical behavior, in experimentally recorded signals. Using the concept of criticality as basic criterion for the characterization of the recorded ECG as that of a healthy person, we find a 100% verification of the characterization Myocardial infarction. In contrary in the cases of the characterization Healthy control we find a 88% agreement. We also consider the autocorrelation function for the ECG time-series which obeys optimally the criteria of criticality and we observe the appearance of specific characteristic symmetries in the corresponding profile.

physics.med-ph↗

arXiv2019

Neurobiological reality simulation through an Artificial Neural Network at criticality

An artificial neural network (ANN) based on fundamental principles of physics can simulate the operation of neurobiological reality of membrane potential as well as the properly defined order parameter. This ANN operates in conditions of criticality and simulates the behavior of an excitatory biological neuron, especially the relaxation phase where the critical fluctuations of biological neuron appear. These critical fluctuations can not be explained by the Hodgkin-Huxley (H-H) model. A proposal for the origin of these fluctuations is being discussed.

physics.bio-ph↗

arXiv2019

Two Dimensional Poincare Maps constructed through Ginzburg-Landau Theory of critical phenomena in Physics

Based on the saddle point approximation in G-L theory of the critical phenomena we construct two-dimensional Poincare maps which describe the symmetry breaking (SB) and the tricritical crossover phenomenon in Physics. The phase space diagrams of these maps are in agreement with the theoretical predictions. A correction in these maps close to the critical point for small values of the order parameter is attempted. Finally we demonstrate that numerical experiments verify the correctness of these maps.

cond-mat.stat-mech↗

arXiv2019

Self-Similarity and Criticality in the Boson (pions) field produced according to dynamic cascade models

In this work we reveal that the inside-outside dynamic model for the production of fermion-antifermion pair (or quark-antiquark in QCD), is an out of equilibrium process. Properties of a complex system as the self-similarity and the critical point of a continuous phase transition in equilibrium appear. In this work we show that this is accomplished imposing a type of mapping process through a self-composition operator on a QED_2 bosons (or pions) field.

hep-ph↗

arXiv2019

The degeneration of critical point in Z(3)spin system. A proposal for QCD confinement-deconfinement phase transition in the color space

The problem of the phase transition of a Z(3) spin system is a complex issue. A numerical simulation in the framework of the mean field theory using the Metropolis algorithm reveals: (a) the existence of second order phase transition with a degenerated critical point which could be considered as a state of resonance (b) hysteresis phenomena which are accompanied with tricritical crossover around the end point of first order transition. Based on these results we propose a scenario about confinement-deconfinement phase transition in SU(3) symmetry of color QCD which, as it is known, has the same center with Z(3) spin system symmetry.

hep-lat↗