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Fractional interpolation inequality and radially symmetric ground states
- Part of
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- Journal:
- Proceedings of the Royal Society of Edinburgh. Section A: Mathematics / Volume 153 / Issue 3 / June 2023
- Published online by Cambridge University Press:
- 12 May 2022, pp. 937-957
- Print publication:
- June 2023
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- Article
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In this paper, we establish a new fractional interpolation inequality for radially symmetric measurable functions on the whole space $R^{N}$
and a new compact imbedding result about radially symmetric measurable functions. We show that the best constant in the new interpolation inequality can be achieved by a radially symmetric function. As applications of this compactness result, we study the existence of ground states of the nonlinear fractional Schrödinger equation on the whole space $R^{N}$
. We also prove an existence result of standing waves and prove their orbital stability.
