Orion's Arm White Papers

Traversable Lorentzian Wormholes: An Overview Adam Getchell - references Visser's book as well as numerous, more recent papers in the literature. - 202 kb
Abstract:

An overview of the history and relevance of wormholes is given. Morris and Thorne's description of a traversable wormhole is revisited, and the requirement for exotic matter is derived. The null, weak, strong, dominant, averaged null, averaged weak, and averaged strong energy conditions and the ways that traversable wormholes violate them is discussed. The connection between topological censorship and the averaged null energy condition is shown, with the result that wormholes are not topologically censored. The existence of a method for extracting a sufficient amount of exotic matter from the vacuum stress energy to build a wormhole with an arbitrarily large throat is proven. The connection between wormholes and time machines is explored, and how theorems related to closed timelike curves (chronology protection) or global hyperbolicity (cosmic censorship) might prevent their creation. Finally, it is stated how physical theories might be reconciled to the notion of traversable Lorentzian wormholes.
(also here)

Traversable Wormholes: some implications by Michael Clive Price - some important insights on wormholes and empire time - 44.4 kb

The Physics of Information Processing Superobjects : Daily Life Among the Jupiter Brains Anders Sandberg - important paper on information processing in Jupiter brains - 331 kb

Space Habitat Illuminators with Non-Imaging Optics - Bill Parkyn - File on Space Ring (Bishop Ring) Habitat Illumination - 1.33 mb

The Sky on Alien Worlds by Stephen Inniss - Surprisingly, such a simple detail as the colour of the sky on an alien world is far less than obvious. There are three reasons for this: incomplete knowledge concerning the workings of the human eye and the perception of colour, a very broad range of possible alien atmospheres, and of course simple lack of experience. Though the fundamental physical principals are all well known, their application is less than obvious.

A Vision by Anders Sandberg - a vision of future terragen expansion and space colonisation

Wormholes and Causality by Xaonon - why only certain wormhole configurations are possible

Some Relevant Links

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