Rational invariant tori and band edge spectra for non-selfadjoint operators

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Abstract : We study semiclassical asymptotics for spectra of non-selfadjoint perturbations of selfadjoint analytic $h$-pseudodifferential operators in dimension 2, assuming that the classical flow of the unperturbed part is completely integrable. Complete asymptotic expansions are established for all individual eigenvalues in suitable regions of the complex spectral plane, near the edges of the spectral band, coming from rational flow-invariant Lagrangian tori.
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https://hal.archives-ouvertes.fr/hal-01737036
Contributor : Imb - Université de Bourgogne <>
Submitted on : Monday, March 19, 2018 - 10:31:43 AM
Last modification on : Friday, June 8, 2018 - 2:50:07 PM

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Michael Hitrik, Johannes Sjöstrand. Rational invariant tori and band edge spectra for non-selfadjoint operators. Journal of the European Mathematical Society, European Mathematical Society, 2018, 20 (2), pp.391-457. ⟨10.4171/JEMS/770⟩. ⟨hal-01737036⟩

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