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A Skyrme-like model with an exact BPS bound (2013)
Journal Article
Ferreira, L., & Zakrzewski, W. (2013). A Skyrme-like model with an exact BPS bound. Journal of High Energy Physics, 2013(9), Article 097. https://doi.org/10.1007/jhep09%282013%29097

We propose a new Skyrme-like model with fields taking values on the sphere S3 or, equivalently, on the group SU(2). The action of the model contains a quadratic kinetic term plus a quartic term which is the same as that of the Skyrme-Faddeev model. T... Read More about A Skyrme-like model with an exact BPS bound.

Some aspects of self-duality and generalised BPS theories (2013)
Journal Article
Adam, C., Ferreira, L., da Hora, E., Wereszczynski, A., & Zakrzewski, W. (2013). Some aspects of self-duality and generalised BPS theories. Journal of High Energy Physics, 2013(8), Article 62. https://doi.org/10.1007/jhep08%282013%29062

If a scalar field theory in (1+1) dimensions possesses soliton solutions obeying first order BPS equations, then, in general, it is possible to find an infinite number of related field theories with BPS solitons which obey closely related BPS equatio... Read More about Some aspects of self-duality and generalised BPS theories.