Year: 2006
Type: article
Abstract: We investigate models described by real scalar fields, searching for defect structures in the presence of interactions which explicitly violate Lorentz and $CPT$ symmetries. We first deal with a single field, and we investigate a class of models which supports traveling waves that violate Lorentz invariance. This scenario is then generalized to the case of two (or more) real scalar fields. In the case of two fields, in particular, we introduce another class of models, which supports topological structures that attain a Bogomol'nyi bound, although violating both Lorentz and $CPT$ symmetries. An example is considered, for which we construct the Bogomol'nyi bound and find some explicit solutions. We show that violation of both Lorentz and $CPT$ symmetries induces the appearance of an asymmetry between defects and antidefects, including the presence of linearly stable solutions with negative energy density in their outer side.
Authors: M. N. Barreto, D. Bazeia, R. Menezes
Institutions: Universidade Federal da Paraíba, Universidade do Porto
Language: Latvian
Subfield: Statistical and Nonlinear Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2180679247