From Feynman’s ratchet to time crystalline molecular motors

Jianmei Wang, Jin Dai, Antti J. Niemi*, Xubiao Peng

*此作品的通讯作者

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摘要

Cats have an instinctive ability to use the connection governing parallel transport in the space of shapes to land safely on their feet. Here, we argue that the concept of connection, which is extensively used in general relativity and other parts of theoretical physics, also explains the impressive performance of molecular motors by enabling molecules to evade the conclusions of Feynman’s ratchet-and-pawl analysis. First, we demonstrate the emergence of directed rotational motion from shape changes, which is independent of angular momentum. Then, we computationally design knotted polyalanine molecules and demonstrate the organization of individual atom thermal vibrations into collective rotational motion, which is independent of angular momentum. The motion occurs effortlessly even in ambient water and can be further enhanced through spontaneous symmetry breaking, rendering the molecule an effective theory time crystal. Our findings can be experimentally verified via nuclear magnetic resonance measurements and hold practical potential for molecular motor design and engineering.

源语言英语
文章编号061101
期刊Journal of Chemical Physics
159
6
DOI
出版状态已出版 - 14 8月 2023

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Wang, J., Dai, J., Niemi, A. J., & Peng, X. (2023). From Feynman’s ratchet to time crystalline molecular motors. Journal of Chemical Physics, 159(6), 文章 061101. https://doi.org/10.1063/5.0160431