The problem of the Grand Unification Theory
Abstract
The evolution and fundamental questions of physical theories unifying the gravitational, electromagnetic, and quantummechanical interactions are explored, taking Pauli's aphorism as a motto: 'Let no man join what God has cast asunder.' The contributions of Faraday and Riemann, Lorentz, Einstein, and others are discussed, and the criterion of Pauli is applied to Grand Unification Theories (GUT) in general and to those seeking to link gravitation and electromagnetism in particular. Formal mathematical symmetry principles must be shown to have real physical relevance by predicting measurable phenomena not explainable without a GUT; these phenomena must be macroscopic because gravitational effects are to weak to be measured on the microscopic level. It is shown that empirical and theoretical studies of 'gravomagnetism', 'gravoelectricity', or possible links between gravoelectrity and the cosmic baryon assymmetry eventually lead back to basic questions which appear philosophical or purely mathematical but actually challenge physics to seek verifiable answers.
 Publication:

Astronomische Nachrichten
 Pub Date:
 1983
 DOI:
 10.1002/asna.2113040402
 Bibcode:
 1983AN....304..145T
 Keywords:

 Astronomical Models;
 Cosmology;
 Unified Field Theory;
 Electromagnetic Fields;
 Gravitational Fields;
 Symmetry;
 Physics (General)