Discrete symmetries, spectra, degeneracies, cross sections: a toy model with interactions centred at the vertices of Platonic solids

International audienc

Critical points for finite Fibonacci chains of point delta-interactions and orthogonal polynomials

International audienc

Normalization of states for a quantum magnetic circular billiard

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Two-dimensional Helmholtz equation with zero Dirichlet boundary condition on a circle: Analytic results for boundary deformation, the transition disk-lens

International audienc