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- W4313448134 abstract "In this article we study the trapped motion of a molecule undergoing diffusivity fluctuations inside a harmonic potential. For the same diffusing-diffusivity process, we investigate two possible interpretations. Depending on whether diffusivity fluctuations are interpreted as temperature or friction fluctuations, we show that they display drastically different statistical properties inside the harmonic potential. We compute the characteristic function of the process under both types of interpretations and analyze their limit behavior. Based on the integral representations of the processes we compute the mean-squared displacement and the normalized excess kurtosis. In the long-time limit, we show for friction fluctuations that the probability density function (PDF) always converges to a Gaussian whereas in the case of temperature fluctuations the stationary PDF can display either Gaussian distribution or generalized Laplace (Bessel) distribution depending on the ratio between diffusivity and positional correlation times." @default.
- W4313448134 created "2023-01-06" @default.
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- W4313448134 date "2022-12-20" @default.
- W4313448134 modified "2023-10-18" @default.
- W4313448134 title "Temperature and friction fluctuations inside a harmonic potential" @default.
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- W4313448134 doi "https://doi.org/10.1103/physreve.106.064127" @default.
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