Düsseldorf 2007 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 67: Poster Teilchenoptik
Q 67.2: Poster
Donnerstag, 22. März 2007, 16:30–18:30, Poster C
The Visualization of the Gödel Universe — •Michael Buser1, Endre Kajari2, Wolfgang P. Schleich3, Frank Grave4, Hanns Ruder5, and Günter Wunner6 — 1Universität Ulm — 2Universität Ulm — 3Universität Tübingen — 4Universität Tübingen — 5Universität Tübingen — 6Universität Stuttgart
An intriguing solution of Einstein's field equations was found by Kurt Gödel in 1949. The Gödel universe describes a homogenous rotating universe in which closed time-like wordlines exist. Traveling along such a wordline allows an observer the mind-boggling journey into his own past. We discuss some properties of the metric, in particular its symmetries, and consider the propagation of light in that universe. It is well known that an optical horizon exists and that a lensing effect can be observed. In our main focus is the bending of the light rays in this universe and how they influence what an observer would see. For that purpose we use ray tracing, a well known method in computer graphics, and show how that technique can be applied to Gödel's universe.