dc.contributor.author |
Tomaschitz, R |
|
dc.date.accessioned |
2008-09-04T11:06:06Z |
|
dc.date.available |
2008-09-04T11:06:06Z |
|
dc.date.issued |
1998-04 |
|
dc.identifier.citation |
International Journal of Modern Physics D, Vol. 7, No. 2, pp. 279 - 298 |
en |
dc.identifier.issn |
0218 - 2718 |
|
dc.identifier.uri |
http://hdl.handle.net/2248/3359 |
|
dc.description |
Restricted Access |
|
dc.description.abstract |
Superluminal signal transfer is studied in the context of a preferred cosmic frame of reference provided by the galactic background. The receding galaxies constitute a frame of absolute rest, in which the energy of tachyons (faster-than-light particles) is unambiguously defined as a positive quantity. The causality violation which arises in relativistic tachyonic theories is avoided. The author defines interactions of particles and tachyons in terms of elastic head-on collisions and energy-momentum conservation. To compare the theory developed with existing relativistic theories, tachyons are studied at first in a Minkowski universe, and the causality of a superluminal communication process is analyzed. Then the author discusses the dynamics of tachyons in a Robertson-Walker universe with linear expansion factor and negatively curved three-space. He points out the consequences that the space expansion has on tachyons, like a finite life-time in the frame of absolute rest, and multiple images in the rest frames of moving observers. |
en |
dc.language.iso |
en |
en |
dc.publisher |
World Scientific |
en |
dc.relation.uri |
http://dx.doi.org/10.1142/S021827189800022X |
en |
dc.subject |
Cosmology |
en |
dc.subject |
Radiative Transfer |
en |
dc.subject |
Robertson-Walker Metric |
en |
dc.title |
Tachyons in Robertson-Walker cosmology |
en |
dc.type |
Article |
en |