Towards a metamaterial simulation of a spinning cosmic string

TL;DR

This paper proposes a metamaterial-based simulation approach to model a spinning cosmic string's spacetime, enabling the study of closed timelike curves in a laboratory setting.

Contribution

It introduces a novel metamaterial design that mimics the spacetime of a spinning cosmic string using a noncovariant formalism.

Findings

Metamaterial parameters successfully replicate the cosmic string spacetime.

The approach provides a new way to investigate closed timelike curves experimentally.

Potential applications in studying exotic spacetime geometries.

Abstract

Establishing the constitutive parameters of a nonhomogeneous bianisotropic medium that is equivalent to the spacetime metric of a spinning cosmic string, in a noncovariant formalism, we found a metamaterial route to investigate the existence of closed timelike curves.