Alice-Bob Physics: Coherent Solutions of Nonlocal KdV Systems

TL;DR

This paper introduces Alice-Bob (AB) systems linked with nonlocal KdV equations, extending symmetries and deriving N-soliton solutions, with applications to correlated phenomena like weather events.

Contribution

It develops a new framework for AB-systems based on extended symmetries, providing explicit N-soliton solutions and demonstrating applications to real-world correlated events.

Findings

Derived new AB-KdV models with shifted symmetries

Obtained explicit N-soliton solutions for AB-KdV systems

Applied models to correlated weather events in China

Abstract

In natural and social science, many events happened at different space-times may be closely correlated. Two events, $A$ (Alice) and $B$ (Bob) are defined correlated if one event is determined by another, say, $B=\hat{f}A$ for suitable $\hat{f}$ operators. Taking KdV and coupled KdV systems as examples, we can find some types of models (AB-KdV systems) to exhibit the existence on the correlated solutions linked with two events. The idea of this report is valid not only for physical problems related to KdV systems but also for problems described by arbitrary continuous or discrete models. The parity and time reversal symmetries are extended to shifted parity and delayed time reversal. The new symmetries are found to be useful not only to establish AB-systems but also to find group invariant solutions of numerous AB-systems. A new elegant form of the $N$-soliton solutions of the KdV equation and then the AB-KdV systems is obtained. A concrete AB-KdV system derived from the nonlinear inviscid dissipative and barotropic vorticity equation in a $\beta$-plane channel is applied to the two correlated monople blocking events which is responsible for the snow disaster in the winter of 2007/2008 happened in Southern China.