Transport and energetics of bacterial rectification

Area of Science:

• Physics of active matter
• Biophysics
• Statistical mechanics

Background:

• Active matter rectification is crucial for biological and technological applications.
• Understanding single-particle dynamics in active matter rectification is limited.
• Living active matter rectification, like bacterial navigation, requires further investigation.

Purpose of the Study:

• To investigate the directed transport and energetics of swimming bacteria in funnel-shaped obstacles.
• To develop a microscopic, parameter-free model for bacterial rectification.
• To establish a generic relationship between time irreversibility, particle fluxes, and extractable work.

Main Methods:

• Experimental observation of bacterial navigation.
• Computational simulations of particle dynamics.
• Theoretical modeling of active matter rectification.
• Quantification of time irreversibility and extractable work.

Main Results:

• A parameter-free model quantitatively explains bacterial rectification.
• The model predicts optimal geometry for maximum rectification efficiency.
• The study quantifies time irreversibility and extractable work in bacterial rectification.

Conclusions:

• The study provides quantitative insights into bacterial rectification.
• A generic relationship between time irreversibility, particle fluxes, and extractable work is established.
• This work sheds light on the energetics of nonequilibrium rectification in living systems.