Local-projective-measurement-enhanced quantum battery capacity

TL;DR

This paper explores how local projective measurements on parts of bipartite quantum systems can enhance the capacity of quantum batteries, offering insights for future experimental advancements.

Contribution

It demonstrates that local projective measurements can improve quantum battery capacity in bipartite systems, providing a new approach for capacity enhancement.

Findings

Local measurements can increase battery capacity.

Enhancement observed in Bell-diagonal and X-type states.

Theoretical insights support experimental development.

Abstract

Quantum batteries have significant potential applications for future industry and daily life. The capacity is an important indicator for a battery. Methods to improve the capacity of quantum batteries are important. We consider quantum batteries given by bipartite quantum systems and study the enhancement of the battery capacity under local projective measurements on a subsystem of the quantum state. By using two-qubit Bell-diagonal states and X-type states as examples, we show that quantum battery capacity with respect to the whole system or a subsystem can be improved by local projective measurements. Our theoretical analysis will provide ideas for the experimental development of quantum batteries.