论文标题
背景字段和自动偶数天空
Background fields and self-dual Skyrmions
论文作者
论文摘要
我们表明，合适的背景字段可以将非BPS拓扑孤子带入其BPS，即自动偶，对应物。例如，我们考虑在最小的Skyrme模型中的天空。我们证明了相应的模量空间的微不足道。这意味着由此产生的自动划分Skyrmion确实在静态地与背景字段相互作用。我们还表明，最初的自动划分天空（例如，BPS Skyrme模型的解决方案）可以在与背景字段耦合后保持自偶性。在这种情况下，BPS Skyrmions可以毫不费力地相对于背景。
We show that a suitable background field can bring a non-BPS topological soliton into its BPS, self-dual, counterpart. As an example we consider Skyrmions in the minimal Skyrme model. We prove the triviality of the corresponding moduli space. This means that the resulting self-dual Skyrmion does statically interact with the background field. We also show that the originally self-dual Skyrmions (e.g. solutions of the BPS Skyrme model) can preserve the self-duality after a coupling with a background field. In this case, BPS Skyrmions can be effortless moved with respect to the background.
