# Enhancement in performance of quantum battery by ordered and disordered interactions

## TL;DR

This paper investigates how ordered and disordered interactions in a quantum spin model can significantly enhance the power extraction of a quantum battery, with effects linked to quantum phase transitions and disorder-induced order.

## Contribution

It demonstrates that interactions in the XYZ spin chain and local fields improve quantum battery performance, with effects robust to system size and disorder.

## Key findings

- Interactions increase power extraction compared to non-interacting models.
- Power behavior correlates with quantum phase transitions.
- Disorder can enhance battery performance through disorder-induced order.

## Abstract

Considering ground state of a quantum spin model as the initial state of the quantum battery, we show that both ordered and disordered interaction strengths play a crucial role to increase the extraction of power from it. In particular, we demonstrate that exchange interactions in the xy-plane and in the z-direction, leading to the XYZ spin chain, along with local charging field in the x-direction substantially enhance the efficiency of the battery compared to the model without interactions. Moreover, such an advantage in power obtained due to interactions is almost independent of the system size. We find that the behavior of the power, although measured during dynamics, can faithfully mimic the equilibrium quantum phase transitions present in the model. We observe that with the proper tuning of system parameters, initial state prepared at finite temperature can generate higher power in the battery than that obtained with zero-temperature. Finally, we report that defects or impurities, instead of reducing the performance, can create larger amount of quenched averaged power in the battery in comparison with the situation when the initial state is produced from the spin chain without disorder, thereby showing the disorder-induced order in dynamics.