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arXiv 1702.07334math.APmath-phmath.MP
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一般维数下局部/非局部相互作用泛函极小元的精确周期条纹

Exact periodic stripes for a minimizers of a local/non-local interaction functional in general dimension

Sara Daneri, Eris Runa

摘要:

我们研究的功能考虑在~ \cite{2011PhRvB..84f4205G,2014CMaPh.tmp..127G,GiuSeirGS}和它的连续版本,类似于一个考虑在~ \cite{GR}。泛函由一个周边项和一个非局部项组成,它们相互竞争。对于连续和离散问题,我们证明了全局极小是精确的周期条纹。泛函的一个显著特征是极小化子在比泛函本身更小的对称群下是不变的。在连续设置中,据我们所知,这是第一个例子的模型与本地/非本地条款的竞争,使功能是不变的坐标置换下,最小化显示的模式形成,这是一维的。在离散设置中较小范围的指数的这种行为已经在~ \cite{GiuSeirGS}中显示。

英文摘要:

We study the functional considered in~\cite{2011PhRvB..84f4205G,2014CMaPh.tmp..127G,GiuSeirGS} and a continuous version of it, analogous to the one considered in~\cite{GR}. The functionals consist of a perimeter term and a non-local term which are in competition. For both the continuous and discrete problem, we show that the global minimizers are exact periodic stripes. One striking feature of the functionals is that the minimizers are invariant under a smaller group of symmetries than the functional itself. In the continuous setting, to our knowledge this is the first example of a model with local/nonlocal terms in competition such that the functional is invariant under permutation of coordinates and the minimizers display a pattern formation which is one dimensional. Such behaviour for a smaller range of exponents in the discrete setting was already shown in~\cite{GiuSeirGS}.

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