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Non-Gaussian Waves in Seba's Billiard
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Mathematics (Div.).ORCID iD: 0000-0003-4734-5092
Sorbonne Univ, Inst Math Jussieu, Campus Pierre & Marie Curie,4 Pl Jussieu, F-75005 Paris, France..
2021 (English)In: International mathematics research notices, ISSN 1073-7928, E-ISSN 1687-0247Article in journal (Refereed) Published
Abstract [en]

The Seba billiard, a rectangular torus with a point scatterer, is a popular model to study the transition between integrability and chaos in quantum systems. Whereas such billiards are classically essentially integrable, they may display features such as quantum ergodicity [11], which are usually associated with quantum systems whose classical dynamics is chaotic. Seba proposed that the eigenfunctions of toral point scatterers should also satisfy Berry's random wave conjecture, which implies that the value distribution of the eigenfunctions ought to be Gaussian. However, Keating, Marklof, and Winn formulated a conjecture that suggested that Seba billiards with irrational aspect ratio violate the random wave conjecture, and we show that this is indeed the case. More precisely, for tori having diophantine aspect ratio, we construct a subsequence of the set of new eigenfunctions having even/even symmetry, of essentially full density, and show that its 4th moment is not consistent with a Gaussian value distribution. In fact, given any set Lambda interlacing with the set of unperturbed eigenvalues, we show non-Gaussian value distribution of the Green's functions G(lambda), for lambda in an essentially full density subsequence of Lambda.

Place, publisher, year, edition, pages
Oxford University Press (OUP) , 2021.
National Category
Mathematics
Identifiers
URN: urn:nbn:se:kth:diva-318508DOI: 10.1093/imrn/rnab289ISI: 000790276500001Scopus ID: 2-s2.0-85152205772OAI: oai:DiVA.org:kth-318508DiVA, id: diva2:1697683
Note

QC 20220921

Available from: 2022-09-21 Created: 2022-09-21 Last updated: 2023-06-08Bibliographically approved

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Kurlberg, Pär

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CiteExportLink to record
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  • apa
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  • de-DE
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