# Rectification of energy and motion in non-equilibrium parity violating metamaterials

## TL;DR

This paper introduces a model of parity violating metamaterials that interact with active particles to rectify energy and motion without temperature gradients, revealing new non-equilibrium mechanisms.

## Contribution

It uncovers novel mechanisms for energy and motion rectification in non-equilibrium systems using a parity violating metamaterial interacting with active particles.

## Key findings

- Energy flows generated without temperature gradients
- Metamaterial can power locomotion in viscous fluids
- Geometry and interactions enable rectification of fluctuations

## Abstract

Uncovering new mechanisms for rectification of stochastic fluctuations has been a longstanding problem in non-equilibrium statistical mechanics. Here, using a model parity violating metamaterial that is allowed to interact with a bath of active energy consuming particles, we uncover new mechanisms for rectification of energy and motion. Our model active metamaterial can generate energy flows through an object in the absence of any temperature gradient. The nonreciprocal microscopic fluctuations responsible for generating the energy flows can further be used to power locomotion in, or exert forces on, a viscous fluid. Taken together, our analytical and numerical results elucidate how the geometry and inter-particle interactions of the parity violating material can couple with the non-equilibrium fluctuations of an active bath and enable rectification of energy and motion.