2015/10/29 by V. Perepelitsa, Perepelitsa, Vassili F.
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #General Physics (physics.gen-ph) #Quantum Mechanics and Applications
paper · pdf · doi:10.48550/arxiv.1512.07921
openalex publication_date 2015/10/29 · openalex created_date 2022/09/04 · openalex updated_date 2026/07/28
The postulate of the preferred reference frame in which the signal propagation is governed by retarded causality is a must for any theory of faster-than-light particles and signals. Such a system does exist and is the comoving system of the relativistic cosmology. Restrictions imposed by the causality conservation can be expressed via a causal Θ function assumed to be acting in both, the classical and quantum field theories of tachyons. A Lorentz-covariant introduction of this Θ function, which ensures a causal behaviour of real tachyons (asymptotic tachyon states) preventing the appearance of causal loops constructed with the use of faster-than-light particles and signals, into the tachyon quantum field operators is suggested.