Charging a quantum battery : investigation of the quantum advantage provided by entanglement

Abstract

A quantum system can be used to store energy in its energy levels, thereby a.ding as a battery. The main aim of this dissertation is to investigate the effect of quantum entanglement on the power generated during the charging of a quantum system for three different cases: closed, open and approximated classical systems. The first case illustrates the advantage provided by quantum entanglement, where the time evolution decreases by a factor of 1/N for N qubits and hence the power produced increases by the same factor. In the other two cases, the degree of entanglement and consequently the amount of power generated was reduced. This work shows that entanglement provides a quantum advantage in power generation over its classical counterparts.