On the "scattering law" for Kasner parameters in the model with one-component anisotropic fluid

TL;DR

This paper presents an exact multidimensional cosmological solution with anisotropic fluid, revealing a scattering law relating Kasner parameters at different asymptotic regimes, extending previous results to a more general setting.

Contribution

It introduces a new exact solution with Kasner-like asymptotics and derives a scattering law relating Kasner parameters, generalizing earlier findings to models with anisotropic fluids.

Findings

Derived a relation between Kasner parameters at different limits

Established Kasner-like asymptotics for the solution

Connected the scattering law to previous S-brane results

Abstract

A multidimensional cosmological type model with 1-component anisotropic fluid is considered. An exact solution is obtained. This solution is defined on a product manifold containing n Ricci-flat factor spaces. We singled out a special solution governed by the function cosh. It is shown that this special solution has Kasner-like asymptotics in the limits \tau \to + 0 and \tau \to + \infty, where \tau is a synchronous time variable. A relation between two sets of Kasner parameters \alpha_{\infty} and \alpha_{0} is found. This formula (of "scattering law") is coinciding with that obtained earlier for the S-brane solution (when scalar fields are absent).