# Experimental Measurement of Relative Path Probabilities and Stochastic Actions

@article{Gladrow2020ExperimentalMO, title={Experimental Measurement of Relative Path Probabilities and Stochastic Actions}, author={Jannes Gladrow and Ulrich Felix Keyser and R. Adhikari and Julian Kappler}, journal={arXiv: Statistical Mechanics}, year={2020} }

For diffusive stochastic dynamics, the probability to observe any individual trajectory is vanishingly small, making it unclear how to experimentally validate theoretical results for ratios of path probabilities. We provide the missing link between theory and experiment, by establishing a protocol to extract ratios of path probabilities from measured time series without fitting a model. For experiments on a single colloidal particle in a microchannel, we extract both ratios of path…

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