81 research outputs found
Neutron star interiors and topology change
Quark matter is believed to exist in the center of neutron stars. A combined
model consisting of quark matter and ordinary matter is used to show that the
extreme conditions existing in the center could result in a topology change,
that is, in the formation of wormholes.Comment: 4 pages, no figure
More on wormholes supported by small amounts of exotic matter
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.Comment: 8 pages AMSTeX; 3 figures adde
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