Abstract
In a dynamic far-field diffraction experiment, we calculate the largest Lyapunov exponent of a time series obtained from the optical fluctuations in a dynamic diffraction pattern. The time series is used to characterize the locomotory predictability of an oversampled microscopic species. We use a live nematode, Caenorhabditis elegans, as a model organism to demonstrate our method. The time series is derived from the intensity at one point in the diffraction pattern. This single time series displays chaotic markers in the locomotion of the Caenorhabditis elegans by reconstructing the multidimensional phase space. The average largest Lyapunov exponent (base e) associated with the dynamic diffraction of 10 adult wildtype (N2) Caenorhabditis elegans is $1.27 \pm 0.03\;{{\rm s}^{- 1}}$.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
Raffaella F. Zanetti, Katherine L. Canavan, Susannah G. Zhang, and Jenny Magnes
Appl. Opt. 62(29) 7812-7818 (2023)
Yan Hu, Qian Chen, Yuzhen Zhang, Shijie Feng, Tianyang Tao, Hui Li, Wei Yin, and Chao Zuo
Appl. Opt. 57(4) 772-780 (2018)
M. Mancinelli, M. Borghi, F. Ramiro-Manzano, J. M. Fedeli, and L. Pavesi
Opt. Express 22(12) 14505-14516 (2014)