# Localization of fermions in coupled chains with identical disorder

## TL;DR

This paper investigates how fermions in coupled chains with identical disorder behave over time, showing that interchain coupling generally destroys initial occupation imbalances in both Anderson and many-body localized systems.

## Contribution

It demonstrates that interchain coupling tends to erase initial imbalances in fermionic ladders with identical disorder, extending understanding of localization in coupled disordered systems.

## Key findings

- Interchain coupling destroys initial imbalance over time.
- Both Anderson and many-body localized systems are affected.
- The effect depends on initial states and ladder geometries.

## Abstract

We study fermionic ladders with identical disorder along the leg direction. Following recent experiments we focus, in particular, on how an initial occupation imbalance evolves in time. By considering different initial states and different ladder geometries we conclude that in generic cases interchain coupling leads to a destruction of the imbalance over time, both for Anderson and for many-body localized systems.