On ground states for the L^2-critical boson star equation

Details On ground states for the L^2-critical boson star equation On ground states for the L^2-critical boson star equation

2009-10-14

arxiv.org/abs/0910.2721v2

Mathematics

Analysis of PDEs

Replaced version; see also http://arxiv.org/abs/1009.4042

Scientific paper

We consider ground state solutions $u \geq 0$ for the $L^2$-critical boson star equation $$ \sqrt{-\Delta} \, u - \big (|x|^{-1} \ast |u|^2 \big) u = -u \quad {in $\R^3$}. $$ We prove analyticity and radial symmetry of $u$. In a previous version of this paper, we also stated uniqueness and nondegeneracy of ground states for the $L^2$-critical boson star equation in $\R^3$, but the arguments given there contained a gap. However, we refer to our recent preprint \cite{FraLe} in {\tt arXiv:1009.4042}, where we prove a general uniqueness and nondegeneracy result for ground states of nonlinear equations with fractional Laplacians in $d=1$ space dimension.

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