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arXiv 1607.01243math.AP
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具有表面能的球值调和映射与$K_{13}$问题

Sphere-valued harmonic maps with surface energy and the $K_{13}$ problem

Stuart Day, Arghir Dani Zarnescu

摘要:

我们考虑的能量泛函的动机著名的$K_{13}$问题的Oseen-Frank理论的液晶。它被定义为球值函数,并表现为通常的Dirichlet能量和附加的表面项。众所周知,这种能量是无界的,我们的目标是研究局部极小。我们表明,即使有一个临界点在一个合适的能量空间施加严格的限制边界条件。有适当的边界条件使能量泛函有界,在这种情况下,我们研究的部分正则性的极小。

英文摘要:

We consider an energy functional motivated by the celebrated $K_{13}$ problem in the Oseen-Frank theory of nematic liquid crystals. It is defined for sphere-valued functions and appears as the usual Dirichlet energy with an additional surface term. It is known that this energy is unbounded from below and our aim has been to study the local minimizers. We show that even having a critical point in a suitable energy space imposes severe restrictions on the boundary conditions. Having suitable boundary conditions makes the energy functional bounded and in this case we study the partial regularity of the minimizers.

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