Temporal Dynamics of Quantum Correlations and Entanglement under Tunneling Asymmetry in Double Quantum Dot Systems

Abstract

This paper investigates the impact of asymmetry in the tunneling energies on nonlocal correlations in a coupled double quantum dot system, using quantifiers such as concurrence, local quantum uncertainty, and Bell inequality violations. Concurrence and local quantum uncertainty help identify the optimal conditions for preserving entanglement and quantum coherence, while violations of Bell inequalities highlight the nonlocal nature of the states. The study shows that asymmetry enhances the preservation of correlations over time, while symmetry leads to faster dissipation but with more pronounced short-term oscillations. These findings emphasize the crucial role of asymmetry in maintaining quantum correlations and entanglement in situations that require temporal stability.