Extracting spinning wormhole energy via magnetic reconnection

TL;DR

This paper investigates the feasibility of extracting rotational energy from spinning wormholes through magnetic reconnection, revealing unique efficiency characteristics compared to black holes and highlighting potential for horizonless object energy extraction.

Contribution

It demonstrates that spinning wormholes can effectively have their energy extracted via magnetic reconnection, with detailed analysis of efficiency and power related to wormhole spin.

Findings

Energy extraction from spinning wormholes is possible with small regularization parameter.

Wormholes can have arbitrarily large spin, but higher spin does not always mean higher efficiency.

Wormholes are more efficient than black holes when reconnection occurs within r/M<1.

Abstract

Magnetic reconnection has been extensively shown to be a promising approach to extract spinning black hole energy. In this paper, we focus on extracting spinning wormhole energy via such mechanism. The study shows that it is indeed possible to extract rotating energy from a spinning wormhole with small regularization parameter $\ell$ of the central singularity. The efficiency and power of the energy extraction are also evaluated. Quite different from the Kerr black hole, the spin of the wormhole can take arbitrarily large value. However, the increasing of wormhole spin not always improves the efficiency and power of energy extraction. By further comparing with the Kerr black hole, we find the wormhole is more efficient when the magnetic reconnection happens within radial distance $r/M<1$. These studies reveal the features of extracting spinning wormhole energy, and more underlying properties are expected to be disclosed for the horizonless objects.