Dual-use quantum hardware for quantum resource generation and energy storage

TL;DR

This paper reveals a direct link between quantum resource generation and energy storage, proposing a superconducting circuit protocol that enables switching between quantum sensing and energy storage functions.

Contribution

It introduces a novel integrated hardware protocol connecting quantum resource generation with quantum battery charging, enabling dynamic switching between sensing and energy storage.

Findings

Protocols for fast resource state generation can charge quantum batteries with a collective advantage.

Quantum battery protocols with a charging advantage can produce resource-rich states rapidly.

The proposed superconducting circuit setup allows interchangeable quantum sensing and energy storage operations.

Abstract

Quantum resources such as entanglement form the backbone of quantum technologies and their efficient generation is a central objective of modern quantum platforms. Independently, quantum batteries have emerged as nanoscale devices that utilize collective quantum effects to store energy with a charging advantage over classical strategies. Here, we show a direct connection between these two pursuits: protocols for fast generation of resourceful quantum states can simultaneously charge a quantum battery with a collective advantage, and conversely, a quantum battery protocol with a charging advantage rapidly produces resource-rich states. Using this connection, we propose an integrated hardware protocol on superconducting circuits in which each experimental run can interchangeably accomplish either quantum battery charging, or quantum sensing through generation of metrologically useful states. Our results establish that quantum resources and stored energy are distinct yet co-producable quantities within the same dynamics, opening the door to modular quantum architectures that dynamically switch between sensing and energy-storage functions, thereby producing additional functionalities without extra hardware cost.