Stable Solitons in Field Theory Models for Tachyon Condensation

Details Stable Solitons in Field Theory Models for Tachyon Condensation Stable Solitons in Field Theory Models for Tachyon Condensation

2001-04-26

arxiv.org/abs/hep-th/0104229v2

JHEP 0106 (2001) 039

Physics

High Energy Physics

High Energy Physics - Theory

Latex, 13 pages, 3 figures; references updated

Scientific paper

10.1088/1126-6708/2001/06/039

We study soliton solutions in scalar field theory with a variety of unbounded potentials. A subset of these potentials have Gaussian lump solutions and their fluctuation spectrum is governed by the harmonic oscillator problem. These lumps are unstable with one tachyonic mode. Soliton solutions in several other classes of potentials are stable and are of kink type. The problem of the stability of these solutions is related to a supersymmetric quantum mechanics problem. The fluctuation spectrum is not equispaced and does not contain any tachyonic mode. The lowest energy mode is the massless Goldstone mode which restores broken translation invariance.

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