精确可解模型和分岔：具有$δ$或$δ'$相互作用的立方$NLS$的情形
Exactly solvable models and bifurcations: the case of the cubic $NLS$ with a $δ$ or a $δ'$ interaction
摘要：
我们明确地给出所有固定的解决方案，聚焦立方NLS的线上，在存在缺陷的类型狄拉克的三角洲或三角洲素数。该模型证明有趣的两个特点：第一，他们是完全可解的，所有的数量可以表示的初等函数。其次，相关的动态远非微不足道。特别地，具有δ素数势的$NLS$表现出两个对称性破缺分叉：第一个涉及基态，并且是已知的。第二个激发态出现在第一个激发态上，至今尚未发现。我们突出这样的分歧，通过计算的非线性和无缺陷的限制的固定解决方案。
英文摘要：
We explicitly give all stationary solutions to the focusing cubic NLS on the line, in the presence of a defect of the type Dirac's delta or delta prime. The models proves interesting for two features: first, they are exactly solvable and all quantities can be expressed in terms of elementary functions. Second, the associated dynamics is far from being trivial. In particular, the $NLS$ with a delta prime potential shows two symmetry breaking bifurcations: the first concerns the ground states and was already known. The second emerges on the first excited states, and up to now had not been revealed. We highlight such bifurcations by computing the nonlinear and the no-defect limits of the stationary solutions.
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