Use of the geometric mean as a statistic for the scale of the coupled Gaussian distributions

KP Nelson, MA Kon, SR Umarov - Physica A: Statistical Mechanics and its …, 2019 - Elsevier
The geometric mean is shown to be an appropriate statistic for the scale of a heavy-tailed
coupled Gaussian distribution or equivalently the Student'st distribution. The coupled …

On the response of power law distributions to fluctuations

A Di Vita - The European Physical Journal B, 2019 - Springer
Both in physical and in non-physical systems, the probability of extreme events depends on
the slope of the tail of a distribution function. Prediction of this slope is often jeopardized by …

Universal level dynamics of complex systems

P Shukla - Physical Review E, 1999 - APS
We study the evolution of the distribution of eigenvalues of a N× N matrix subject to a
random perturbation drawn from (i) a generalized Gaussian ensemble and (ii) a non …

Nonlinear statistical coupling

KP Nelson, S Umarov - Physica A: Statistical Mechanics and its …, 2010 - Elsevier
By considering a nonlinear combination of the probabilities of a system, a physical
interpretation of Tsallis statistics as representing the nonlinear coupling or decoupling of …

Large deviations of spread measures for Gaussian matrices

FD Cunden, P Vivo - Journal of Statistical Mechanics: Theory and …, 2016 - iopscience.iop.org
For a large $ n\times m $ Gaussian matrix, we compute the joint statistics, including large
deviation tails, of generalized and total variance—the scaled log-determinant H and trace T …

Non-Gaussian distributions under scrutiny

T Dauxois - Journal of Statistical Mechanics: Theory and …, 2007 - iopscience.iop.org
Non-Gaussian distributions under scrutiny Page 1 Journal of Statistical Mechanics: Theory
and Experiment NEWS AND PERSPECTIVES Non-Gaussian distributions under scrutiny To …

Gaussian processes and universal parametric decorrelations of wavefunctions

D Mitchell, Y Alhassid, D Kusnezov - Physics Letters A, 1996 - Elsevier
Gaussian processes that depend on a parameter lead to universal parametric correlations of
spectra and wavefunctions after an appropriate scaling of the parameter. The most general …

Global fluctuations and Gumbel statistics

E Bertin - Physical review letters, 2005 - APS
We explain how the statistics of global observables in correlated systems can be related to
extreme value problems and to Gumbel statistics. This relationship then naturally leads to …

Dimensionless fluctuations balance applied to statistics and quantum physics

M Oliveira, G Valadares, F Rodrigues, M Freire - Scientific Reports, 2024 - nature.com
This work presents a new method called Dimensionless Fluctuation Balance (DFB), which
makes it possible to obtain distributions as solutions of Partial Differential Equations (PDEs) …

A note on q-Gaussians and non-Gaussians in statistical mechanics

HJ Hilhorst, G Schehr - Journal of Statistical Mechanics: Theory …, 2007 - iopscience.iop.org
The sum of N sufficiently strongly correlated random variables will not in general be
Gaussian distributed in the limit. We revisit examples of sums x that have recently been put …