6 papers
Wormholes with low energy density
Peter K. F. Kuhfittig
In spite of their speculative nature, traversable wormholes are a topic of interest that started with the Einstein-Rosen bridge in 1935 and became a major research area with the in…
Revisiting the boundary conditions for a Morris-Thorne wormhole
Peter K. F. Kuhfittig
In physical science, the concept of \emph{emergence} is often used to describe phenomena that occur at macroscopic scales but not at microscopic scales. The latter is usually refer…
A viable wormhole model in a five-dimensional spacetime
Peter K. F. Kuhfittig
This paper generalizes two of the author's earlier wormhole solutions that are characterized by an extra spatial dimension. This paper adds the assumption that the components of th…
Possible existence of time machines in a five-dimensional spacetime
Peter K. F. Kuhfittig
The idea of constructing a time machine is not new and even received a boost thanks to the realization that a traversable wormhole could be converted to a time machine. It was show…
Supporting traversable wormholes: the case for noncommutative geometry
Peter K. F. Kuhfittig
While wormholes may be just as good a prediction of Einstein's theory as black holes, they are subject to severe restrictions from quantum field theory. In particular, a wormhole c…
Macroscopic noncommutative-geometry wormholes as emergent phenomena in gravity
Peter K. F. Kuhfittig
Noncommutative geometry, an offshoot of string theory, replaces point-like particles by smeared objects. These local effects have led to wormhole solutions in a semiclassical setti…