uu.seUppsala University Publications

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On the Scaling Ratios for Siegel DisksPrimeFaces.cw("AccordionPanel","widget_formSmash_some",{id:"formSmash:some",widgetVar:"widget_formSmash_some",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_all",{id:"formSmash:all",widgetVar:"widget_formSmash_all",multiple:true});
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PrimeFaces.cw("AccordionPanel","widget_formSmash_responsibleOrgs",{id:"formSmash:responsibleOrgs",widgetVar:"widget_formSmash_responsibleOrgs",multiple:true}); 2015 (English)In: Communications in Mathematical Physics, ISSN 0010-3616, E-ISSN 1432-0916, Vol. 333, no 2, 931-957 p.Article in journal (Refereed) Published
##### Abstract [en]

##### Place, publisher, year, edition, pages

2015. Vol. 333, no 2, 931-957 p.
##### National Category

Physical Sciences
##### Identifiers

URN: urn:nbn:se:uu:diva-247180DOI: 10.1007/s00220-014-2181-zISI: 000348302700011OAI: oai:DiVA.org:uu-247180DiVA: diva2:795126
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Available from: 2015-03-13 Created: 2015-03-13 Last updated: 2016-02-17Bibliographically approved

The boundary of the Siegel disk of a quadratic polynomial with an irrationally indifferent fixed point and the rotation number whose continued fraction expansion is preperiodic has been observed to be self-similar with a certain scaling ratio. The restriction of the dynamics of the quadratic polynomial to the boundary of the Siegel disk is known to be quasisymmetrically conjugate to the rigid rotation with the same rotation number. The geometry of this self-similarity is universal for a large class of holomorphic maps. A renormalization explanation of this universality has been proposed in the literature. In this paper we provide an estimate on the quasisymmetric constant of the conjugacy, and use it to prove bounds on the scaling ratio lambda of the form alpha(gamma) <= |lambda| <= C delta(s), where s is the period of the continued fraction, and alpha is an element of (0, 1) depends on the rotation number in an explicit way, while C > 1, delta is an element of (0, 1) and gamma is an element of (0, 1) depend only on the maximum of the integers in the continued fraction expansion of the rotation number.

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