The Cauchy Problem for Membranes

Details The Cauchy Problem for Membranes The Cauchy Problem for Membranes

2008-07-22

arxiv.org/abs/0807.3465v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, 0 figures, submitted to Class. Quantum Grav, adapted from dissertation arXiv:0807.2539

Scientific paper

We show existence and uniqueness for timelike minimal submanifolds (world volume of p-branes) in ambient Lorentz manifolds admitting a time function in a neighborhood of the initial submanifold. The initial value formulation introduced and the conditions imposed on the initial data are given in purely geometric terms. Only an initial direction must be prescribed in order to provide uniqueness for the geometric problem. The result covers non-compact initial submanifolds of any codimension. By considering the angle of the initial direction and vector fields normal to the initial submanifold with the unit normal to the foliation given by the time function we obtain a quantitative description of "distance" to the light cone. This description makes it possible to treat initial data which are arbitrarily close to the light cone. Imposing uniform assumptions give a lower bound for a notion of "time of existence" depending only on geometric quantities involving the length of timelike curves lying in the solution.

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