Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-04-10
Class.Quant.Grav. 15 (1998) 1895-1913
Physics
High Energy Physics
High Energy Physics - Theory
26 pages, Latex, IOP style, sumbitted to Classical and Quantum Gravity (1998)
Scientific paper
10.1088/0264-9381/15/7/008
Conventional non-Abelian SO(4) gauge theory is able to describe gravity provided the gauge field possesses a specific polarized vacuum state. In this vacuum the instantons and anti-instantons have a preferred direction of orientation. Their orientation plays the role of the order parameter for the polarized phase of the gauge field. The interaction of a weak and smooth gauge field with the polarized vacuum is described by an effective long-range action which is identical to the Hilbert action of general relativity. In the classical limit this action results in the Einstein equations of general relativity. Gravitational waves appear as the mode describing propagation of the gauge field which strongly interacts with the oriented instantons. The Newton gravitational constant describes the density of the considered phase of the gauge field. The radius of the instantons under consideration is comparable with the Planck radius.
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