Note on DBI dynamics of Dbrane Near NS5-branes

Details Note on DBI dynamics of Dbrane Near NS5-branes Note on DBI dynamics of Dbrane Near NS5-branes

2005-01-21

arxiv.org/abs/hep-th/0501176v3

Phys.Rev.D72:046005,2005

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, 2 figures; typos corrected, discussions improved; gauge dynamics has been included

Scientific paper

10.1103/PhysRevD.72.046005

In this note, we investigate the homogeneous radial dynamics of (Dp, NS5)-systems without and with one compactified transverse direction, in the framework of DBI effective action. During the homogeneous evolution, the electric field on the D-brane is always conserved and the radial motion could be reduced to an one-dimension dynamical system with an effective potential. When the Dp-brane energy is not high, the brane moves in a restricted region, with the orbits depending on the conserved energy, angular momentum through the form of the effective potential. When the Dp-brane energy is high enough, it can escape to the infinity. It turns out that the conserved angular momentum plays an interesting role in the dynamics. Moreover, we discuss the gauge dynamics around the tachyon vacuum and find that the dynamics is very reminiscent of the string fluid in the rolling tachyon case.

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