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20062026
most citedSpectral shift function for perturbed periodic Schroedinger operators. The large-coupling constant limit case

3 citations · 8 across the 14 of their papers we have counts for

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math.AP2026

Stationary phase with Cauchy singularity. A critical point of signature

Christian Klein, Johannes Sjöstrand, Maher Zerzeri

Asymptotic expressions for an integral appearing in the solution of a d-bar problem are presented. The integral is a solid Cauchy transform of a function with a rapidly oscillating…

math.AP2025

Counter-examples to the fractal Weyl law for semiclassical resonances

Jean-Francois Bony, Setsuro Fujiie, Thierry Ramond +1

Under general assumptions, the numbers of semiclassical resonances is known to be bounded from above by a negative power of which is given by the fractal dimension of the trapp…

math.AP2020

Semiclassical Gevrey operators and magnetic translations

Michael Hitrik, Richard Lascar, Johannes Sjoestrand +1

We study semiclassical Gevrey pseudodifferential operators acting on the Bargmann space of entire functions with quadratic exponential weights. Using some ideas of the time frequen…

math.AP2020

Semiclassical Gevrey operators in the complex domain

Michael Hitrik, Richard Lascar, Johannes Sjoestrand +1

We study semiclassical Gevrey pseudodifferential operators, acting on exponentially weighted spaces of entire holomorphic functions. The symbols of such operators are Gevrey functi…

math.AP2020

Resonances over a potential well in an island

Johannes Sjöstrand, Maher Zerzeri

In this paper we study the distribution of scattering resonances for a multidimensional semi-classical Schrödinger operator, associated to a potential well in an island at energies…

math.AP2016

Barrier-top resonances for non globally analytic potentials

Jean-Francois Bony, Setsuro Fujiie, Thierry Ramond +1

We give the semiclassical asymptotic of barrier-top resonances for Schrödinger operators on , , whose potential is everywhere and analytic a…