TY - JOUR ID - TorresLedesma2024 LB - TorresLedesma2024 AU - Torres Ledesma, César E. AU - Gutierrez, Hernán C. AU - Rodríguez, Jesús A. AU - Bonilla, Manuel M. TI - Properties of the least action level and the existence of ground state solution to fractional elliptic equation with harmonic potential ST - Properties of the least action level and the existence of ground state solution to fractional elliptic equation with harmonic potential JO - Opuscula Math. JA - Opuscula Math. JF - Opuscula Mathematica PY - 2024 VL - 44 IS - 5 SP - 749 EP - 765 DO - https://doi.org/10.7494/OpMath.2024.44.5.749 UR - https://doi.org/10.7494/OpMath.2024.44.5.749 AB - In this article we consider the following fractional semilinear elliptic equation \[(-\Delta)^su+|x|^2u =\omega u+|u|^{2\sigma}u \quad \text{ in } \mathbb{R}^N,\] where \(s\in (0,1)\), \(N\gt 2s\), \(\sigma\in (0,\frac{2s}{N-2s})\) and \(\omega\in (0, \lambda_1)\). By using variational methods we show the existence of a symmetric decreasing ground state solution of this equation. Moreover, we study some continuity and differentiability properties of the ground state level. Finally, we consider a bifurcation type result. KW - harmonic potential KW - fractional Sobolev space KW - ground state solution KW - bifurcation result KW - variational method SN - 1232-9274 ER -