Origin of the geometric tachyon
arXiv:0804.2863 · doi:10.1103/PhysRevD.78.061901
Abstract
The motion of a Dp-brane in the background of a stack of coincident NS5-branes is analysed as the motion of a relativistic point particle in the transverse space of the five-branes. In this system, the particle experiences a proper acceleration orthogonal to its proper velocity due to the background dilaton field which changes the dynamics from that of a simple geodesic motion. In particular, we show that in the vicinity of the five-branes, it is this acceleration which is responsible for modifying the motion of the radial mode to that of an inverted simple harmonic oscillator leading to the tachyonic instability.
4 pages, revtex, v2: eq.(22), (24) and (25) corrected
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- Proper acceleration, geometric tachyon and dynamics of a fundamental string near D branes
- Motion of a Test Particle in the Transverse space of Dp-Branes
- Fundamental String (Membrane) Orbiting D5(M5)-branes
- Warming up D3 brane motion in the background of D5 brane and Inflation