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On the uniqueness of minimisers of Ginzburg-Landau functionals

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arxiv 1708.05040 v2 pith:HQUVNMLM submitted 2017-08-16 math.AP math-phmath.MP

On the uniqueness of minimisers of Ginzburg-Landau functionals

classification math.AP math-phmath.MP
keywords minimisersmathbbginzburg-landaumapsuniquenessappropriateassumptionboundary
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We provide necessary and sufficient conditions for the uniqueness of minimisers of the Ginzburg-Landau functional for $\mathbb{R}^n$-valued maps under a suitable convexity assumption on the potential and for $H^{1/2} \cap L^\infty$ boundary data that is non-negative in a fixed direction $e\in \mathbb{S}^{n-1}$. Furthermore, we show that, when minimisers are not unique, the set of minimisers is generated from any of its elements using appropriate orthogonal transformations of $\mathbb{R}^n$. We also prove corresponding results for harmonic maps

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