Self-Similar Modes of Coherent Diffusion
Autor: | Ofer Firstenberg, Rami Pugatch, Nir Davidson, Dimitry Yankelev, Moshe Shuker, Paz London |
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Jazyk: | angličtina |
Rok vydání: | 2010 |
Předmět: | |
Popis: | Self-similar solutions of the coherent diffusion equation are derived and measured. The set of real similarity solutions is generalized by the introduction of a nonuniform phase surface, based on the elegant Gaussian modes of optical diffraction. In an experiment of light storage in a gas of diffusing atoms, a complex initial condition is imprinted, and its diffusion dynamics is monitored. The self-similarity of both the amplitude and the phase pattern is demonstrated, and an algebraic decay associated with the mode order is measured. Notably, as opposed to a regular diffusion spreading, a self-similar contraction of a special subset of the solutions is predicted and observed. 10 pages, 5 figures |
Databáze: | OpenAIRE |
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