Lyapunov methods 36 Chaos theory 12 Lyapunov exponent 10 Quantum theory 10 Chaotic systems 8 Entropy 8 Algorithms 6 Brain 6 Electroencephalography 6 Mathematical models 6 Models, Neurological 6 Nonlinear systems 6 Quantum chaos 6 Statistical mechanics 6 Action Potentials 4 Biological neural communications channels 4 Classical systems 4 Correlation methods 4 Correlators 4 Decoherence 4 Eigenvalues and eigenfunctions 4 Hamiltonians 4 Harmonic oscillator 4 Information Theory 4 Molecular dynamics 4 Nerve Net 4 Neural networks 4 Neurons, Afferent 4 Neurophysiology 4 Oscillators (electronic) 4