Summary
The Finsler geometry is a more suitable framework for physics than the Riemannian geometry. Both electromagnetism and gravity can be geometrized such that the electrogravitational phenomena are consequences of a curved Finsler space-time with a local gauge symmetry. The fundamental metric tensor Gij(x, x) depends on a particle’s position xi and velocity xi:Gij(x, x) = (1 −bAk(x)xk/a)2 gij(x), wherea = (- gij(x)xixj)1/2 andb = e/mc2. Furthermore, all 〈classical〉 field equations of electro-gravity can be derived from an invariant action function involving the curvature tensor, Cijk h = fδi hFjk + Hijk h, of the Finsler space-time. The results of such a geometrization are consistent with experiments. They show that the usual concept of a flat space-time with an additional electromagnetic field is physically equivalent to that of a curved Finsler space-time with the metric tensor Gij(x, x) in which gij(x) is replaced by constant ηij.
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References
H. Rund:The Differential Geometry of Finsler Spaces (Springer-Verlag, Berlin, 1959), pp.65–71 for discussions on covariant derivatives. See also G. S. Asanov:Finsler Geometry, Relativity and Gauge Theories (D. Reidel, Boston, Mass., 1985); A. Bejancu:Finsler Geometry and Applications (Ellis Horwood, Chichester, 1990).
Element of support is denoted by (xi, xi). Namely, at each point xi a previously assigned direction (or velocity) xi must be given.
The covariant derivative of the metric tensor vanishes.
For an excellent review, seeW. Pauli:Theory of Relativity (Pergamon, London, 1958, translated by G. Feld), pp. 192–202, 223-224.
See, for example, ref.[1], p. 67, pp. 94-101.
Such a genuine change of gauge resembles Weyl’s gauge transformation,jk(x) = gjk(x)λ(x), ¯Ai(x)= Ak(x)+ (∂λ(x)/∂xk)/λ(x), where λ(x) is an arbitrary function of position. See ref. [4]:Theory of Relativity (Pergamon, London, 1958), p. 194.
H. Weyl:Ann. Phys. (Leipzig),59, 192 (1919);Space-Time-Matter (Methuen & Co. Ltd, London, 1992).
W. Pauli:Collected Scientific Papers, edited byR. Kronig andW. F. Weisskopf (Interscience, New York, N.Y., 1964), Vol. 2, pp. 1–9, 13-23.
In the presence of a charged-fermion matter source or gauge groups different from the electromagnetic U(1) group, the situation will be more complicated and further modifications of the Finsler space is needed. See, for example,J. P. Hsu:Phys. Lett. B,119, 328 (1982). For a discussion of the application of this type of action to quark potential in a confinement chromodynamics, see J. P. Hsu and M. J. Wang, UMassD preprint (1993).
The discussion here is pure classical. To be more realistic, one has to consider a more massive object or quantum effects. For a discussion of transition from quantum to classical behaviour of an object, seeJ. P. Hsu:Phys. Rev. A,43, 3227 (1991).
J. P. Hsu: inScience of Matter, Festschrift for Ta You Wu, edited by S. Fujita (Gordon and Breach, 1978) pp. 65-73; see alsoNuovo Cimento B,61, 249 (1981).
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Hsu, J.P. Geometrization of electromagnetism and gravity based on a finsler space-time with gauge symmetry. Nuov Cim B 108, 183–195 (1993). https://doi.org/10.1007/BF02874409
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DOI: https://doi.org/10.1007/BF02874409