Impact of network architecture on the exciton dynamics in an open quantum battery

Abstract

Understanding the interplay between network architecture and exciton dynamics is crucial for optimizing the performance of open quantum systems, particularly in excitonic quantum batteries (QBs). This study explores how variations in network topology influence exciton storage and transport in QBs modeled as open quantum networks with exchange symmetries embedded in their structural design. We simulate exciton dynamics in systems with different architectures—including single-ring and stacked ring configurations of varying sizes—initialized in one of their symmetry-protected dark states. For single-ring systems, our findings reveal how different initial dark states influence exciton transfer during the discharge phase, how ring size affects the discharge rate, and how noise impacts storage efficiency as a function of ring size. For stacked ring systems, we demonstrate how the efficiency of exciton transfer to the sink depends on the inter-ring coupling strength. Overall, these results offer detailed insights into how architectural modifications can be leveraged to enhance the performance of excitonic QBs.