Abstract
Consider the Schrödinger operator \(\mathcal {{L}}=-\Delta +V\) in \(\mathbb {{R}}^n, n\ge 3,\) where V is a nonnegative potential satisfying a reverse Hölder condition of the type
We define \(\Lambda ^\alpha _\mathcal {{L}},\, 0<\alpha <2,\) the class of measurable functions such that
where \(\rho \) is the critical radius function associated to \(\mathcal {L}\). Let \(W_y f = e^{-y\mathcal {{L}}}f\) be the heat semigroup of \(\mathcal {{L}}\). Given \(\alpha >0,\) we denote by \(\Lambda _{\alpha /2}^{{W}}\) the set of functions f which satisfy
We prove that for \(0<\alpha \le 2-n/q\), \(\Lambda ^\alpha _\mathcal {{L}}= \Lambda _{\alpha /2}^{{W}}.\) As application, we obtain regularity properties of fractional powers (positive and negative) of the operator \(\mathcal {{L}}\), Schrödinger Riesz transforms, Bessel potentials and multipliers of Laplace transforms type. The proofs of these results need in an essential way the language of semigroups. Parallel results are obtained for the classes defined through the Poisson semigroup, \(P_yf= e^{-y\sqrt{\mathcal {{L}}}}f.\)
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Marta De León-Contreras was partially supported by grant EPSRC Research Grant EP/S029486/1. José L. Torrea was partially supported by Grant PGC2018-099124-B-I00 (MINECO/FEDER)
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De León-Contreras, M., Torrea, J.L. Lipschitz spaces adapted to Schrödinger operators and regularity properties. Rev Mat Complut 34, 357–388 (2021). https://doi.org/10.1007/s13163-020-00357-9
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DOI: https://doi.org/10.1007/s13163-020-00357-9