标题： 振荡从$Q$-球中产生 显示英文标题

标题： Oscillons from $Q$-balls

摘要： 利用重正化群理论，我们证明了（1+1）维振荡子可以在主要非线性阶从具有普遍复场理论的$Q$-球中获得。对于具有非零三次或四次项的势，普遍的$Q$-球理论可以很好地由可积复正弦戈登模型近似。这使我们能够通过福多尔等人的一般化微扰展开超越最简单的未调制振荡子情况。具体来说，我们将激发振荡子的特征振幅调制解释为两个$Q$-球（双振荡子）束缚态形成的效应。 显示英文摘要

摘要： Using Renormalization Group Theory we show that oscillons in (1+1)-dimensions can be obtained, at the leading nonlinear order, from $Q$-balls of universal complex field theories. For potentials with a nonzero cubic or quartic term the universal $Q$-ball theory is well approximated by the integrable complex sine-Gordon model. This allows us to generalize the usual perturbative expansion by Fodor et. al. beyond the simplest unmodulated oscillon case. Concretely, we explain the characteristic amplitude modulations of excited oscillons as an effect of formation of a two-$Q$-ball (two-oscillon) bound state.