C. Tretter

activity

20092022

most citedEigenvalue estimates for non-selfadjoint Dirac operators on the real line

39 citations · 169 across the 20 of their papers we have counts for

collaborators

Showing 2015Show all

3 papers · 1 filter

math.SP2015

Approximations of spectra of Schrödinger operators with complex potentials on $R^{d}$

Sabine Bögli, Petr Siegl, Christiane Tretter

We study spectral approximations of Schrödinger operators $T = - Δ + Q$ with complex potentials on $Ω = R^{d}$ , or exterior domains $Ω \subset R^{d}$ , by domain truncation. O…

math.SP2015★ 8 cited

Analysis of the essential spectrum of singular matrix differential operators

Orif O. Ibrogimov, Petr Siegl, Christiane Tretter

A complete analysis of the essential spectrum of matrix-differential operators $A$ of the form \begin{align} \begin{pmatrix} -\displaystyle{\frac{\rm d}{\rm d t}} p \displ…

math-ph2015★ 2 cited

Non-linear eigenvalue problems and applications to photonic crystals

Christian Engström, Heinz Langer, Christiane Tretter

We establish new analytic and numerical results on a general class of rational operator Nevanlinna functions that arise e.g. in modelling photonic crystals. The capability of these…

Approximations of spectra of Schrödinger operators with complex potentials on Rd

Analysis of the essential spectrum of singular matrix differential operators

Non-linear eigenvalue problems and applications to photonic crystals

Approximations of spectra of Schrödinger operators with complex potentials on $R^{d}$