Time Isotropy, Lorentz Transformation and Inertial Frames
Abstract
Homogeneity of space and time, spatial isotropy, principle of relativity and the existence of a finite speed limit (or its variants) are commonly believed to be the only axioms required for developing the special theory of relativity (Lorentz transformations). In this paper it is shown, however, that Lorentz transformation cannot actually be derived without the explicit assumption of time isotropy (time-reversal symmetry) which is logically independent of the other postulates of relativity. Postulating time isotropy also restores the symmetry between space and time in the postulates of relativity. Inertial frames are defined in influential texts as frames having space-time homogeneity and spatial isotropy only. Inclusion of time isotropy in that definition is also suggested.
Cite
@article{arxiv.1704.08840,
title = {Time Isotropy, Lorentz Transformation and Inertial Frames},
author = {Somajit Dey},
journal= {arXiv preprint arXiv:1704.08840},
year = {2018}
}
Comments
Changes/Updates in v2: Revision of an endnote. Addition to references. Abstract and introduction rewritten for clearer presentation. All results, analysis and conclusion however remain the same as in v1. Critiques, queries, comments and suggestions are welcome at author's email ids