NDLI: Spinor-unit field representation of electromagnetism applied to a model inflationary cosmology

Content Provider	Springer Nature Link
Author	Nash, Patrick L.
Copyright Year	2012
Abstract	The new spinor-unit field representation of the electromagnetism (Nash in J Math Phys 51:042501-1–042501-27, 2010) (with quark and lepton sources) is integrated via minimal coupling with standard Einstein gravitation, to formulate a Lagrangian model of the very early universe. A completely new solution to the coupled Einstein–Maxwell equations, with sources, is derived. These equations are generalized somewhat, but not in a way that violates any physical principles. The solution of the coupled Euler–Lagrange field equations yields a scale factor a(t) (comoving coordinates) that initially exponentially increases N e-folds from a(0) ≈ 0 to a 1 = a(0) e N (N = 60 is illustrated), then exponentially decreases, then exponentially increases to a 1, and so on almost periodically. (Oscillatory cosmological models are not knew, and have been derived from string theory and loop quantum gravity.) It is not known if the scale factor escapes this periodic trap. This model is noteworthy in several respects: 1. All fundamental fields other than gravity are realized by spinor fields. 2. A plausible connection between the unit field u and the generalization of the photon wave function with a form of Dark Energy is described, and a simple natural scenario is outlined that allocates a fraction of the total energy of the Universe to this form of Dark Energy. 3. A solution of an analog of the pure Einstein–Maxwell equations is found using an approach that is in marked contrast with the method followed to obtain a solution of the well known Friedmann model of a radiation-dominated universe.
Starting Page	2147
Ending Page	2179
Page Count	33
File Format	PDF
ISSN	00017701
Journal	General Relativity and Gravitation
Volume Number	44
Issue Number	9
e-ISSN	15729532
Language	English
Publisher	Springer US
Publisher Date	2012-05-17
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Einstein–Maxwell equations Unit field equations Inflation Cosmology Astronomy, Astrophysics and Cosmology Classical and Quantum Gravitation, Relativity Theory Quantum Physics Differential Geometry Theoretical, Mathematical and Computational Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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