Unveiling quantum resources in dimeric perylene-based arrays

Source abstract

Abstract Over the past few decades, the manipulation of organic molecules has become a central focus in theoretical and experimental physics. These molecules are foundational to many current technologies and hold potential for future advancements, such as quantum computers. They are particularly promising for light harvesting and energy transfer applications due to the strong dipole–dipole coupling between their transition dipole moments. However, there is still a limited understanding of when quantum resources in these systems remain relevant in the presence of high noise levels. In this paper, we investigate the effects of thermal noise on dimeric perylene-based arrays, focusing on quantum resources such as Bures entanglement, Hellinger coherence, EPR steering, and Bell inequality violation in Perylene-Bisimide. We analyze how equilibrium temperature, interaction strength, and molecular transitions impact the dynamics of quantum resources. Our results indicate that varying the molecules frequency transitions and tuning the dipole–dipole interaction strength can control quantum resources and the degree of Bell inequality violation. Additionally, we find that Hellinger coherence is more resistant against thermal noise than Bures entanglement and that Bell’s inequality is not violated at infinite temperatures. Furthermore, EPR steering demonstrates greater resilience to increasing temperatures compared to Bell inequality violation.