Work

Superextensive charging speeds in a correlated quantum charger

Year: 2026

Type: article

Abstract: We define a quantum charger as an interacting quantum system that transfers energy between two drives. The key figure of merit characterizing a charger is its charging power. Remarkably, the presence of long-range interactions within the charger can induce a collective steady-state charging mode that depends superlinearly on the size of the charger, exceeding the performance of noninteracting, parallel units. Using the driven Lipkin-Meshkov-Glick model and power-law interacting spin chains, we show that this effect persists up to a critical system size set by the breakdown of the high-frequency regime. We discuss optimal work output as well as experimentally accessible initial states. The superlinear charging effect can be probed in trapped-ion experiments, and positions interacting Floquet systems as promising platforms for enhanced energy conversion.

Source: Physical review. B./Physical review. B

DOI: 10.1103/pkc6-c3pd

Authors: Harald Schmid, Felix von Oppen, Gil Refael, Yang Peng

Institutions: Munich Center for Quantum Science and Technology, Technical University of Munich, Freie Universität Berlin, California Institute of Technology, California State University, Northridge

Language: English

Topic: Advanced Thermodynamics and Statistical Mechanics

Subfield: Statistical and Nonlinear Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid