Münster 1997 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 14: Postersitzung II: Korrelierte Systeme(1-40), Theorie der Supraleitung(41-50), Metall-Isolator-Übergang, Lokalisierung(51-66), Niederdimensionale Systeme, Quantenhalleffekt(67-80), Pinning, kritische Ströme und Vortexdynamik(81-93), HTSL-Drähte und -Bänder(94-98), Massive HTSL(99-104), supraleitende Borkarbide(105-109)
TT 14.59: Poster
Mittwoch, 19. März 1997, 15:00–18:30, Z1
Statistics of wave functions in disordered and in classically chaotic systems — •Bernhard Mehlig2, Kirsten Müller1, F. Milde1, and M. Schreiber1 — 1Inst. f. Physik, TU Chemnitz-Zwickau, 09107 Chemnitz — 2Max-Planck-Institut f"ur Physik komplexer Systeme, Bayreuther Str. 40, Haus 16, 01187 Dresden
We consider the statistics of wavefunction intensities in disordered and classically chaotic systems. We present numerical results for the two-dimensional tight-binding Anderson model of localization and for the hydrogen atom in a strong magnetic field. At low disorder or strong classical chaos, respectively, we find extended states which show a Porter-Thomas distribution of intensities according to the universal predictions of random matrix theory. Localization due to disorder or weakly unstable regions in classical phase space cause characteristic deviations from universality.