Work

High-Power Collective Charging of a Solid-State Quantum Battery

Year: 2018

Type: article

Abstract: Quantum information theorems state that it is possible to exploit collective quantum resources to greatly enhance the charging power of quantum batteries (QBs) made of many identical elementary units. We here present and solve a model of a QB that can be engineered in solid-state architectures. It consists of N two-level systems coupled to a single photonic mode in a cavity. We contrast this collective model ("Dicke QB"), whereby entanglement is genuinely created by the common photonic mode, to the one in which each two-level system is coupled to its own separate cavity mode ("Rabi QB"). By employing exact diagonalization, we demonstrate the emergence of a quantum advantage in the charging power of Dicke QBs, which scales like sqrt[N] for N≫1.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.120.117702

Authors: Dario Ferraro, Michele Campisi, Gian Marcello Andolina, Vittorio Pellegrini, Marco Polini

Institutions: Italian Institute of Technology, Scuola Normale Superiore, National Enterprise for NanoScience and NanoTechnology

Language: English

Topic: Advanced Thermodynamics and Statistical Mechanics

Subfield: Statistical and Nonlinear Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: European Cooperation in Science and Technology

Award: G1011900814