Linearization of thick K-branes
Abstract
We study the linearization of a class of thick K-branes, namely, four-dimensional domain walls generated by a scalar field with particular nonstandard kinetic terms. The master equations for linear perturbations are derived from the point of view of both dynamical equations and quadratic action. The spectra of the canonical normal modes are studied using supersymmetric quantum mechanics. Our results indicate that the scalar perturbation is nonlocalizable in general. Conditions for stable K-branes are also found.
- Publication:
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Physical Review D
- Pub Date:
- July 2013
- DOI:
- arXiv:
- arXiv:1307.7639
- Bibcode:
- 2013PhRvD..88b4017Z
- Keywords:
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- 04.50.-h;
- 11.27.+d;
- 98.80.Cq;
- Higher-dimensional gravity and other theories of gravity;
- Extended classical solutions;
- cosmic strings domain walls texture;
- Particle-theory and field-theory models of the early Universe;
- High Energy Physics - Theory
- E-Print:
- The introduction and some discussions have been rewritten