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Propagation of wave packets in randomly stratified media | | V. D. Freilikher
; Yu. V. Tarasov
; | | Date: |
9 Jul 2001 | | Journal: | Phys. Rev. E, v. 64, 056620 (2001) | | Subject: | Disordered Systems and Neural Networks | cond-mat.dis-nn | | Abstract: | The propagation of a narrow-band signal radiated by a point source in a randomly layered absorbing medium is studied asymptotically in the weak-scattering limit. It is shown that in a disordered stratified medium that is homogeneous on average a pulse is channelled along the layers in a narrow strip in the vicinity of the source. The space-time distribution of the pulse energy is calculated. Far from the source, the shape of wave packets is universal and independent of the frequency spectrum of the radiated signal. Strong localization effects manifest themselves also as a low-decaying tail of the pulse and a strong time delay in the direction of stratification. The frequency-momentum correlation function in a one-dimensional random medium is calculated. | | Source: | arXiv, cond-mat/0107180 | | Other source: | [GID 722008] pmid11736129 | | Services: | Forum | Review | PDF | Favorites | |
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