The holographic solution - Why general relativity must be understood in terms of strings

Abstract

This paper is a significantly expanded version of gr-qc/0306066. It discusses the geometric properties of the so called holographic solution, an exact, spherically symmetric solution to the Einstein field equations with zero cosmological constant. The holographic solution can be regarded as the simplest solution of the field equations including matter. Its interior matter-density follows an inverse square law: e = 1 / (8 pi r2). The interior principle pressures are P_r = - e in the radial direction and P_tan = 0 in the tangential direction. This is the equation of state of a radial arrangement of strings. The interior string type matter state is densely packed, each string occupying a transverse extension of exactly one Planck area, and bounded by a membrane consisting out of tangential pressure. The membrane's energy density is zero, as expected from string theory. Despite its simple structure, the results that can be derived from this solution are far from trivial. It is not possible to give a fair account of all relevant results in a 20-line abstract. The reader is referred to the abstract in the paper, which summarizes some of the more important results. The author appreciates any comments, critique or suggestions of new material.

147 pages, 5 figures

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• Are we living in a string-dominated universe?
• On the origin of the matter-antimatter asymmetry in self-gravitating systems at ultra-high temperatures
• Compact anisotropic stars with membrane - a new class of exact solutions to the Einstein field equations
• On the thermodynamic origin of the Hawking entropy and a measurement of the Hawking temperature