On low frequency and 1/f noise from diffusion like processes |
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Authors: | I Lundström D McQueen C Klason |
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Institution: | Organic Electron Physics Group Sweden;The Rheological Laboratory, Chalmers University of Technology, Gothenburg, Sweden |
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Abstract: | The noise spectrum resulting from diffusion like processes is calculated in two and three dimensions for two different forms of free energy fluctuation. For example it is shown that in a three dimensional system with ideal non-interacting particles the noise is almost white up to a certain frequency. In a two dimensional system where the free energy fluctuations are proportional to the gradient of a parameter modulating the electrical conductivity a 1/f noise power spectrum is expected in a certain frequency interval. |
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