Quantum-inspired information entropy in multi-field turbulence

TL;DR

This paper introduces a quantum-inspired information entropy framework for multi-field turbulence, revealing new transition thresholds and classifications of turbulence states based on energy and information measures.

Contribution

It formulates a novel turbulence entropy using quantum mechanics concepts and applies it to turbulent plasmas, uncovering new transition phenomena and insights into nonlinear interactions.

Findings

Discovery of a new nontrivial transition threshold in turbulence entropy

Classification of turbulence states using combined energy and information measures

EE describes both nonlinear mode coupling strength and energy transfer direction

Abstract

A novel information entropy of turbulence systems with multiple field quantities is formulated. Inspired by quantum mechanics, the von Neumann entropy (vNE) and the entanglement entropy(EE) are derived from a density matrix for the turbulence state in terms of the multi-field singular value decomposition (MFSVD). Applying the information-theoretic entropy analyses to spatio-temporal dynamics in turbulent plasmas with phase-transition-like behavior, we discover a new nontrivial transition threshold regarding the vNE, which significantly deviates from the transition threshold of the field energy considered in the conventional approaches. These findings provide us with new classifications of the turbulence state in terms of combined energy and information. It is also shown that the EE for nonlinear interactions in turbulence simultaneously describes not only the information for the strength of nonlinear mode couplings but also the direction of net energy transfer.