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Wave Operators for Schr\"odinger Operators with Threshold Singuralities, Revisited

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arxiv 1508.05738 v1 pith:M7GQAFVV submitted 2015-08-24 math-ph math.MP

classification math-phmath.MP
keywords odingeroperatoroperatorscontinuitycontinuousdimensionalevenresolvent
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abstract

The continuity property in the Sobolev space $W^{k,p}({\bf R}^m)$ of wave operators of scattering theory for $m$-dimensional single-body Schr\"odinger operator is considered when the resolvent of the operator has singularities at the bottom of the continuous spectrum. It is shown that they are continuous in $W^{k,p}({\bf R}^m)$, $0\leq k \leq 2$, for $1<p<3$ but not for $p>3$ if $m=3$ and, for $1<p<m/2$ but not for $p>m/2$ if $m\geq 5$. This extends the previously known interval of $p$ for the continuity, $3/2<p<3$ for $m=3$ and $m/(m-2)<p<m/2$ for $m\geq 5$. The formula which represents the integral kernel of the resolvent of the even dimensional free Sch\"odinger operator as the superposition of exponential-polynomial like functions substantially simplifies the proof of the previous paper when $m \geq 6$ is even.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The $L^p$-continuity of wave operators for fractional order Schr\"odinger operators

    math.AP 2025-09 conditional novelty 6.0 of 10

    Wave operators for fractional Schrödinger operators are proven bounded on Lp for all 1≤p≤∞ under decay or smallness conditions on the potential, yielding dispersive and Strichartz estimates for the perturbed flow.

  2. $L^p$ boundedness of wave operators for higher order schr\"odinger operators with threshold eigenvalues

    math.AP 2025-06 conditional novelty 6.0 of 10

    For higher-order Schrödinger operators with a threshold eigenvalue in dimensions 2m < n ≤ 4m, the wave operators are bounded on L^p for the natural range, with extended ranges and a new L∞ endpoint under extra orthogo...

  3. Intertwining operators beyond the Stark Effect

    math.AP 2024-12 conditional novelty 6.0 of 10

    In two dimensions, for scaling-critical electromagnetic Schrödinger operators with mean flux outside 1/2 Z (or with symmetric electric potential in the resonant case), the newly defined intertwining operators are L^p-...

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