English

Fractional uncertainty

Functional Analysis 2018-03-08 v1

Abstract

We use techniques of dyadic analysis in order to prove that, for every 0<s<120<s<\tfrac{1}{2}, there exists a positive constant γ(s)\gamma(s) such that the inequality (R2xy2s1φ(x)φ(y)dxdy)(R2xy2s1φ(x)φ(y)2dxdy)γ(s)\left(\iint_{\mathbb{R}^2}|x-y|^{2s-1}|\varphi(x)||\varphi(y)|dx dy\right)\left(\iint_{\mathbb{R}^2}|x-y|^{-2s-1}|\varphi(x)-\varphi(y)|^2 dx dy\right)\geq \gamma(s) holds for every φ\varphi with φL2(R)=1||\varphi||_{L^2(\mathbb{R})}=1. The second integral on the left hand side is the energy quadratic form of order ss, which for the limit case s=1s=1 gives the local form Varφ^2Var|\hat{\varphi}|^2 or φ2\int|\nabla\varphi|^2. The first is a natural substitution of the position form, which on the Haar system shows the same behavior of the classical Varφ2Var|\varphi|^2.

Keywords

Cite

@article{arxiv.1803.02384,
  title  = {Fractional uncertainty},
  author = {Hugo Aimar and Pablo Bolcatto and Ivana Gómez},
  journal= {arXiv preprint arXiv:1803.02384},
  year   = {2018}
}

Comments

12 pages, 2 figures

R2 v1 2026-06-23T00:44:22.634Z