More on wormholes supported by small amounts of exotic matter

TL;DR

This paper presents a macroscopic wormhole model that balances minimal exotic matter with manageable fine-tuning, addressing the engineering challenges of traversable wormholes supported by small amounts of exotic matter.

Contribution

It introduces a new wormhole model that reduces exotic matter while maintaining traversability, balancing two conflicting design requirements.

Findings

The model is macroscopic and traversable.

It minimizes exotic matter support.

It highlights trade-offs between matter support and fine-tuning.

Abstract

Recent papers by Fewster and Roman have emphasized that wormholes supported by arbitrarily small amounts of exotic matter will have to be incredibly fine-tuned if they are to be traversable. This paper discusses a wormhole model that strikes a balance between two conflicting requirements, reducing the amount of exotic matter and fine-tuning the metric coefficients, ultimately resulting in an engineering challenge: one requirement can only be met at the expense of the other. The wormhole model is macroscopic and satisfies various traversability criteria.