Bags, junctions, and networks of BPS and nonBPS defects

Dec, 1999
20 pages
Published in:
  • Phys.Rev.D 61 (2000) 105019
e-Print:

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1999200520112017202302468
Abstract:
We investigate several models of coupled scalar fields that present discrete Z_2, Z_2 x Z_2, Z_3 and other symmetries. These models support topological domain wall solutions of the BPS and non-BPS type. The BPS solutions are stable, but the stability of the non-BPS solutions may depend on the parameters that specify the models. The BPS and non-BPS states give rise to bags, and also to three-junctions that may allow the presence of networks of topological defects. In particular, we show that the non-BPS defects of a specific model that engenders the Z_3 symmetry give rise to a stable regular hexagonal network of domain walls.
  • field theory: scalar
  • symmetry: Z(2)
  • symmetry: Z(3)
  • symmetry: Z(2) x Z(2)
  • soliton: BPS
  • defect: topological
  • stability