We study Schrödinger operators with Floquet boundary conditions on flat tori obtaining a spectral result giving an asymptotic expansion of all the eigenvalues. The expansion is in λ−δ with δ∈(0,1) for most of the eigenvalues λ (stable eigenvalues), while it is a “directional expansion” for the remaining eigenvalues (unstable eigenvalues). The proof is based on a structure theorem which is a variant of the one proved in [31,32] and on a new iterative quasimode argument.
Spectral asymptotics of all the eigenvalues of Schrödinger operators on flat tori / D. Bambusi, B. Langella, R. Montalto. - In: NONLINEAR ANALYSIS. - ISSN 0362-546X. - 216:(2022 Mar), pp. 112679.1-112679.37. [10.1016/j.na.2021.112679]
Spectral asymptotics of all the eigenvalues of Schrödinger operators on flat tori
D. BambusiPrimo
;R. MontaltoUltimo
2022
Abstract
We study Schrödinger operators with Floquet boundary conditions on flat tori obtaining a spectral result giving an asymptotic expansion of all the eigenvalues. The expansion is in λ−δ with δ∈(0,1) for most of the eigenvalues λ (stable eigenvalues), while it is a “directional expansion” for the remaining eigenvalues (unstable eigenvalues). The proof is based on a structure theorem which is a variant of the one proved in [31,32] and on a new iterative quasimode argument.File | Dimensione | Formato | |
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