Wigner analysis of operators. Part I: Pseudodifferential operators and wave fronts
E Cordero, L Rodino - Applied and Computational Harmonic Analysis, 2022 - Elsevier
We perform Wigner analysis of linear operators. Namely, the standard time-frequency
representation Short-time Fourier Transform (STFT) is replaced by the A-Wigner distribution …
representation Short-time Fourier Transform (STFT) is replaced by the A-Wigner distribution …
Anisotropic global microlocal analysis for tempered distributions
L Rodino, P Wahlberg - Monatshefte für Mathematik, 2023 - Springer
We study an anisotropic version of the Shubin calculus of pseudodifferential operators on R
d. Anisotropic symbols and Gabor wave front sets are defined in terms of decay or growth …
d. Anisotropic symbols and Gabor wave front sets are defined in terms of decay or growth …
[PDF][PDF] Spectral inequalities for Schrödinger operators and parabolic observability
A Dicke - 2022 - eldorado.tu-dortmund.de
This thesis consists of eight chapters and two appendices. Chapter 1 grants an overview
over the main results. Thereafter, in Chapter 2 the notation is fixed, the operators are …
over the main results. Thereafter, in Chapter 2 the notation is fixed, the operators are …
Wave packet analysis of semigroups generated by quadratic differential operators
SI Trapasso - arXiv preprint arXiv:2408.11130, 2024 - arxiv.org
We perform a phase space analysis of evolution equations associated with the Weyl
quantization $ q^{\mathrm {w}} $ of a complex quadratic form $ q $ on $\mathbb {R}^{2d} …
quantization $ q^{\mathrm {w}} $ of a complex quadratic form $ q $ on $\mathbb {R}^{2d} …
Phase space analysis of spectral multipliers for the twisted Laplacian
SI Trapasso - arXiv preprint arXiv:2306.00592, 2023 - arxiv.org
We prove boundedness results on modulation and Wiener amalgam spaces for some
families of spectral multipliers for the twisted Laplacian. We exploit the metaplectic …
families of spectral multipliers for the twisted Laplacian. We exploit the metaplectic …
Propagation of global analytic singularities for Schrödinger equations with quadratic Hamiltonians
F White - Journal of Functional Analysis, 2022 - Elsevier
We study the propagation in time of 1/2-Gelfand-Shilov singularities, ie global analytic
singularities, of tempered distributional solutions of the initial value problem {u t+ qw (x, D) …
singularities, of tempered distributional solutions of the initial value problem {u t+ qw (x, D) …
The Wigner global wave front set in spaces of tempered ultradistributions
V Asensio - Journal of Pseudo-Differential Operators and …, 2023 - Springer
In this paper we introduce and study global wave front sets in terms of the τ-Wigner
transform in global ultradifferentiable classes of Beurling type modulated with weight …
transform in global ultradifferentiable classes of Beurling type modulated with weight …