Coupling and Level Repulsion in the Localized Regime: From Isolated to Quasiextended Modes

K. Y. Bliokh (1, 2) , Y. P. Bliokh (3) , V. Freilikher (4) , Azriel Genack (5) , Patrick Sebbah (6)

1 Nonlinear Physics Centre
2 IRA - Institute of Radio Astronomy of NAS of Ukraine
3 Department of Physics [Haifa]
4 Department of Physics [Ramat-Gan]
5 QC - Department of Physics, Queens College, CUNY
6 LPMC - Laboratoire de physique de la matière condensée

We study the interaction of Anderson localized states in an open 1D random system by varying the internal structure of the sample. As the frequencies of two states come close, they are transformed into multiply peaked quasiextended modes. Level repulsion is observed experimentally and explained within a model of coupled resonators. The spectral and spatial evolution of the coupled modes is described in terms of the coupling coefficient and Q factors of resonators.

Domaines: Autre [cond-mat.other]

K. Y. Bliokh, Y. P. Bliokh, V. Freilikher, Azriel Genack, Patrick Sebbah. Coupling and Level Repulsion in the Localized Regime: From Isolated to Quasiextended Modes. Physical Review Letters, 2008, 101 (13), pp.133901. ⟨10.1103/PhysRevLett.101.133901⟩. ⟨hal-00432798⟩