TACHYONS IN ROBERTSON–WALKER COSMOLOGY

Author:

TOMASCHITZ ROMAN12

Affiliation:

1. Department of Physics, Hiroshima University, 1-3-1 Kagami-yama, Higashi-Hiroshima 724, Japan

2. Indian Institute of Astrophysics, Koramangala, Bangalore 560 034, India

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 unambi-guously defined as a positive quantity. The causality violation which arises in relativistic tachyonic theories is avoided. We define 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 we discuss the dynamics of tachyons in a Robertson–Walker universe with linear expansion factor and negatively curved three-space. We point 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.

Publisher

World Scientific Pub Co Pte Lt

Subject

Space and Planetary Science,Astronomy and Astrophysics,Mathematical Physics

Cited by 11 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Revisiting Barry Cox and James Hill's theory of superluminal motion: a possible solution to the problem of spinless tachyon localization;Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences;2015-03

2. From absolute time to time machine;RIV NUOVO CIMENTO;2003

3. Einstein coefficients and equilibrium formalism for tachyon radiation;Physica A: Statistical Mechanics and its Applications;2001-04

4. Tachyons, Lamb shifts and superluminal chaos;The European Physical Journal B;2000-10

5. CONFORMAL TACHYONS;International Journal of Modern Physics A;2000-07-30

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