Speziell-relativistische Physik

Schmutzer, Ernst

doi:10.1007/978-3-322-80113-5_4

Cited by 22 publications

(44 citation statements)

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“…The price for this resolution of the problem was that one had to alter the geometrical foundation of Einstein's theory. This idea received attention from Jordan, Pauli and several others over the years [39,[115][116][117][118][119][120][121][122]. Early versions of the theory ran afoul of experimental constraints on the Brans-Dicke parameter ω and had to be ruled out as untenable [15].…”

Section: The Projective Approachmentioning

confidence: 99%

Kaluza-Klein gravity

1997

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Section: The Projective Approachmentioning

confidence: 99%

Kaluza-Klein gravity

1997

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“…In 1957, he moved to the Friedrich-Schiller-University of Jena, obtained his habilitation there in 1958, and was appointed professor in 1960. With a couple of master-degree students, he managed, during the 1960s, to establish a group for research in general relativity and 5-dimensional gravity [239], [240]. His request to the ministry in Berlin, i.e., to approve a main focus "relativity and gravitation" in Jena, was accepted.…”

Section: The First Decades Until 1980mentioning

confidence: 99%

General relativity and the growth of a sub-discipline “gravitation” in Germany

Goenner

2017

EPJ H

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2 Before World War II: Research and teaching by single scientists 2.1 The early years of general relativity 2.1.1 Progress during World War I: 1915 to 1918 After a long maturing period, general relativity was completed in November 1915 with field equations suggested by the physicist Albert Einstein [7] and the mathematician David Hilbert [8]. (For the priority debate, cf. [9], [10], [11], [12], [13].) Unlike in the case of special relativity, the physicists around Einstein in Berlin were slow in accepting the new theory. In a letter to Arnold Sommerfeld, he expressed perfect satisfaction about his achievement, but held: "[..] but none of the peers has recognized up to now the depth and necessity of this path." In particular, Max Planck and Max von Laue were not open to his considerations of principle [14]. Nevertheless, already in 1916 and 1917 three of the best known and most useful exact solutions of Einstein's field equations were found. The first, describing an isolated finite spherically symmetric mass-distribution at rest, was communicated to Einstein already in December 1915 by his colleague in Berlin, the astronomer Karl Schwarzschild (1873-1916), then in Russia with the German army. The result was published in 1916 [15], [17], [16]. In the same year, a student of Hendrik Antoon Lorentz in Leiden, Johannes Droste (1886-1963), in his dissertation independently presented this same (Schwarzschild) solution [20]. 4The aircraft-designer and professor at the Technical University in Berlin-Charlottenburg, Hans Reissner (1874-1967), followed with an exact solution for a time-independent, isolated, electrically charged spherically symmetric mass [21]. It was rediscovered in 1918 by Gunnar Nordström [22]. The third important solution, the de Sitter-solution, is described further below. Einstein himself propagated his new gravitational theory in an article [23] and in a book for everbody (with some physics education) [24]; in a number of papers he also worked out consequences of the theory, among others for cosmology and gravitational waves [27]. Also in 1916, the astronomer Erwin

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“…The approach of Schmutzer starts with completely new geometric axioms for the five-dimensional projective space and is distinguished from previous work by an intrinsically succinct method for projecting 5-vectors onto the ordinary 4-dimensional space-time with Riemannian geometry. The field equations, balance equations, conservation laws and the physical interpretation of PUFT have evolved over the years, from its origin [72][73][74] in different stages [75][76][77][78] to the present [79][80][81][82][83][84]. The ingredients in this spacetime are: gravity, electromagnetism and scalarism (as physical reality on the same physical level).…”

Section: Projective Unified Field Theorymentioning

confidence: 99%

Implications upon theory discrimination of an accurate measurement of the time rate of change of the gravitational “constant” G and other cosmological parameters

2010

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A substantial improvement in the accuracy ofĠ tests (The dot denotes the time derivative.) would make it realistic to speak in terms of a measurement ofĠ, rather than merely a smaller upper bound on |Ġ|. We show that the accuracy Δ|Ġ/G| ≈ 10 −14 yr −1 may be sufficient, given the accuracy of other cosmological parameters, to observe effects predicted by higher dimensions theories and, hence, to discriminate among different models. TheĠ design goal for the SEE (Satellite Energy Exchange) mission is Δ(Ġ/G) ≈ 10 −14 yr −1 .

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Speziell-relativistische Physik

Cited by 22 publications

References 0 publications

Kaluza-Klein gravity

Kaluza-Klein gravity

General relativity and the growth of a sub-discipline “gravitation” in Germany

Implications upon theory discrimination of an accurate measurement of the time rate of change of the gravitational “constant” G and other cosmological parameters

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