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- W1697123002 abstract "Recent advances in light microscopy have spawned new research frontiers in microbiology by working around the diffraction barrier and allowing for the observation of nanometric biological structures. Microrheology is the study of the properties of complex fluids, such as those found in biology, through the dynamics of small embedded particles, typically latex beads. Statistics based on the recorded sample paths are then used by biophysicists to infer rheological properties of the fluid. In the biophysical literature, the main statistic for characterizing diffusivity is the so-named mean squared displacement (MSD) of the tracer particles. Notwithstanding the central role played by the MSD, its asymptotic distribution in different cases has not yet been established. In this paper, we tackle this problem. We take a pathwise approach and assume that the particle movement undergoes a Gaussian, stationary-increment stochastic process. We show that as the sample and the increment lag sizes go to infinity, the MSD displays Gaussian or non-Gaussian limiting distributions, as well as distinct convergence rates, depending on the diffusion exponent parameter. We illustrate our results analytically and computationally based on fractional Brownian motion and the (integrated) fractional Ornstein-Uhlenbeck process." @default.
- W1697123002 created "2016-06-24" @default.
- W1697123002 creator A5072740925 @default.
- W1697123002 creator A5081762841 @default.
- W1697123002 date "2015-07-23" @default.
- W1697123002 modified "2023-09-24" @default.
- W1697123002 title "The asymptotic distribution of the pathwise mean squared displacement in single particle tracking experiments" @default.
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- W1697123002 doi "https://doi.org/10.48550/arxiv.1507.06567" @default.
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