Large Supremum Norms and Small Shannon Entropy for Hecke Eigenfunctions of Quantized Cat Maps
2009 (English)In: Communications in Mathematical Physics, ISSN 0010-3616, E-ISSN 1432-0916, Vol. 286, no 3, 1051-1072 p.Article in journal (Refereed) Published
This paper concerns the behavior of eigenfunctions of quantized cat maps and in particular their supremum norm. We observe that for composite integer values of N, the inverse of Planck's constant, some of the desymmetrized eigenfunctions have very small support and hence very large supremum norm. We also prove an entropy estimate and show that our functions satisfy equality in this estimate. In the case when N is a prime power with even exponent we calculate the supremum norm for a large proportion of all desymmetrized eigenfunctions and we find that for a given N there is essentially at most four different values these assume.
Place, publisher, year, edition, pages
2009. Vol. 286, no 3, 1051-1072 p.
IdentifiersURN: urn:nbn:se:kth:diva-24329DOI: 10.1007/s00220-008-0627-xISI: 000263059600008ScopusID: 2-s2.0-59449109020OAI: oai:DiVA.org:kth-24329DiVA: diva2:346576
QC 201009012010-09-012010-09-012010-09-02Bibliographically approved