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Dumbbell dimer dynamics in three-dimensional chiral fluids.

Michalis Chatzittofi^1,2, Yuto Hosaka¹

¹Max Planck Institute for Dynamics and Self-Organization, (MPI-DS), Am Fassberg 17, 37077 Göttingen, Germany.

Physical Review. E

|December 23, 2025

Summary

This summary is machine-generated.

Chirality in a chiral environment with odd viscosity induces rotational dynamics in dumbbell dimers. Thermal fluctuations further influence rotational diffusivity by coupling conformational changes and motion.

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Area of Science:

Soft Matter Physics
Chemical Physics
Materials Science

Background:

Classical systems with conserved parity symmetry typically do not exhibit rotational motion from reciprocal oscillations.
Understanding emergent dynamics in chiral environments is crucial for designing novel molecular machines and materials.

Purpose of the Study:

To investigate the orientational dynamics of a dumbbell dimer in a three-dimensional chiral environment with odd viscosity.
To determine how chirality and thermal fluctuations influence the rotational motion and diffusivity of the dimer.

Main Methods:

Analytical calculations were performed to model the dimer's behavior.
The study incorporated thermal fluctuations to explore their impact on rotational dynamics.

Main Results:

The presence of chirality was found to induce rotational dynamics dependent on the dimer's expansion/contraction.
Rotational diffusivity is significantly affected by the coupling between conformational fluctuations and rotational motion.

Conclusions:

This research provides insights into systems where parity symmetry is broken, particularly in odd-viscous fluids.
The findings can serve as a foundation for studying collective behaviors in complex systems like multicomponent molecular machines and charged polymers.