Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2005-08-11
Physics
Condensed Matter
Disordered Systems and Neural Networks
18 pages, 2 figures
Scientific paper
Subsequent to the ideas presented in our previous papers [J.Phys.: Condens. Matter {\bf 14} (2002) 13777 and Eur. Phys. J. B {\bf 42} (2004) 529], we discuss here in detail a new analytical approach to calculating the phase-diagram for the Anderson localization in arbitrary spatial dimensions. The transition from delocalized to localized states is treated as a generalized diffusion which manifests itself in the divergence of averages of wavefunctions (correlators). This divergence is controlled by the Lyapunov exponent $\gamma$, which is the inverse of the localization length, $\xi=1/\gamma$. The appearance of the generalized diffusion arises due to the instability of a fundamental mode corresponding to correlators. The generalized diffusion can be described in terms of signal theory, which operates with the concepts of input and output signals and the filter function. Delocalized states correspond to bounded output signals, and localized states to unbounded output signals, respectively. Transition from bounded to unbounded signals is defined uniquely be the filter function $H(z)$. Simplifications in the mathematical derivations of the previous papers (averaging over initial conditions) are shown to be mathematically rigorous shortcuts.
Kuzovkov V. N.
Niessen von W.
No associations
LandOfFree
A new approach to the analytic solution of the Anderson localization problem for arbitrary dimensions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A new approach to the analytic solution of the Anderson localization problem for arbitrary dimensions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A new approach to the analytic solution of the Anderson localization problem for arbitrary dimensions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-277365