Impossibility Tachyons

2022

Key words: superluminal signaling, tachyons, the information flow

rieevuto il 25 Giugno 1973) Some recent papers showed us that sometimes the philosophy expressed by us m our series of papers (~,3) about the classical theory of tachyons (i.e. about special relativity generalized to Superluminal reference frames) has not been well understood. For instance, in ref.

Some arguments in favour of the existence of tachyons and extensions of the Lorentz Group are presented. On the former, it is observed that with a slight modification to standard electromagnetic theory a single superluminal charge will bind to itself in a self-sustaining circular orbit, suggestive of a (modified) electromagnetic interpretation of the strong force. Symmetries in that theory are used in the subsequent analysis as a starting point in the search for physically-motivated extensions of the Lorentz Group. There is some discussion of the validity of imaginary coordinates in superluminal transformations of frame. The article concludes with some speculation on the implications for faster-than light travel.

arXiv: General Physics, 2015

A new causal paradox in superluminal signaling is presented. In contrast to the Tolman paradox with tachyon exchange between two parties, the new paradox appears already in a one-way superluminal signaling, even without creating the time loop. This produces a universal ban on superluminal signals, which is stronger than the ban imposed by the Tolman paradox. The analysis also shows that records of evolution of a superluminal object observed from two different reference frames may be time-reversed with respect to each other. Interactions with such objects could add some new features to spectroscopy. Even though relativity embraces superluminal motions, thus making the world symmetric with respect to the invariant speed barrier, their ineptness for signaling makes the symmetry incomplete. Key words: superluminal signaling, tachyons, the Tolman paradox

La Rivista del Nuovo Cimento, 1974

RIVISTA ])EL NUOVO CIMENTO ¥OL. 4, ~. 2 Aprile-Giugno 1974 1. -Foreword.

Foundations of Physics, 1987

The chronological order of the events along a spacelike path is not invariant under Lorentz transformations, as is well known. This led to an early conviction that tachyons would give rise to causal anomalies. A relativistic version of the Sti~ckelberg-Feynman "switching procedure" (SWP) has been invoked as the suitable tool to eliminate those anomalies. The application of the SWP does eliminate the motions backwards in time, but interchanges the roles of source and detector. This fact triggered the proposal of a host of causal "paradoxes." Till now, however, it has not been recognized that such paradoxes can be sensibly discussed (and completely solved, at least "'in microphysics") only after the tachyon relativistic mechanics has been properly developed. We start by showing how to apply the SWP, both in the case of ordinary special relativity and in the case with tachyons. Then we carefully exploit the kinematics of the tachyon exchange between to (ordinary) bodies. Being finally able to tackle the tachyon causality problem, we successively solve the paradoxes of : (i) Tolman-Regge, (ii) Pirani, (iii) Edmonds, and (iv) Bell. Finally, we discuss a further, new paradox associated with the transmission of signals by modulated tachyon beams.

viXra, 2020

Concerns that tachyons, which have imaginary mass, may violate causality have been been discussed in the context of two distinct embodiments for constructing a message loop. One employs transmitters in motion relative to receivers, while the other has transmitters and receivers at rest with each other and messages are passed between moving observers using electromagnetic signals. The latter (Method II) is of interest only to those who seek to disprove the existence of faster-than-light phenomena by constructing hypothetical thought experiments based solely upon kinematics that purportedly violate causality, often by specious means. The former (Method I), on the other hand, is based upon the wider foundation of both kinematics and dynamics, and sound analysis proves that causality is not violated. For Method I, the relative speed between transmitter and receiver limits the propagation speed according to u = c^2/v, where u is the maximum possible propagation speed and v is the relativ...

Foundations of Physics, 1979

Although the existence of tachyons is not ruled out by special relativity, it appears that causal paradoxes will arise if there are taehyons. The usual solutions to these paradoxes employ some form of the reinterpretation principle. In this paper it is argued first that the principle is incoherent, second that even if it is not, some causal paradoxes remain, and third, the most plausible "solution,'" which appeals to boundary conditions of the universe, wilt conflict with special relativity.