Dynamical p-branes with a cosmological constant

Details Dynamical p-branes with a cosmological constant Dynamical p-branes with a cosmological constant

2010-06-11

arxiv.org/abs/1006.2306v2

Phys.Rev.D82:046007,2010

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, 7 figures; v2: minor corrections

Scientific paper

10.1103/PhysRevD.82.046007

We present a class of dynamical solutions in a D-dimensional gravitational theory coupled to a dilaton, a form field strength, and a cosmological constant. We find that for any D due to the presence of a cosmological constant, the metric of solutions depends on a quadratic function of the brane world volume coordinates, and the transverse space cannot be Ricci flat except for the case of 1-branes. We then discuss the dynamics of 1-branes in a D-dimensional spacetime. For a positive cosmological constant, 1-brane solutions with D>4 approach the Milne universe in the far-brane region. On the other hand, for a negative cosmological constant, each 1-brane approaches the others as the time evolves from a positive value, but no brane collision occurs for D>4, since the spacetime close to the 1-branes eventually splits into the separate domains. In contrast, the D=3 case provides an example of colliding 1-branes. Finally, we discuss the dynamics of 0-branes and show that for D>2, they behave like the Milne universe after the infinite cosmic time has passed.

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