Self-Similar Modes of Coherent Diffusion

Autor: Ofer Firstenberg, Rami Pugatch, Nir Davidson, Dimitry Yankelev, Moshe Shuker, Paz London
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