Entropic uncertainty and quantum correlations in perylene-qubit dimers under decoherence channels
Ahmad N. Khedr, Samira Elghaayda, Mostafa Mansour
Abstract We explore how thermal fluctuations and noisy decoherence affect non-classical correlations and entropic uncertainty relations in a perylene-bisimide (PBI) dimer system represented by two coupled molecular two-level systems. The composite Hamiltonian includes dipole-dipole interaction between the monomers, and the system’s initial state is considered the thermal Gibbs state, which exhibits entanglement at a finite temperature. Environmental noise is introduced through amplitude damping, phase damping, and phase-flip channels, allowing us to trace the evolution of logarithmic negativity, trace distance discord, and the quantum-memory-assisted entropic uncertainty relation (QMA-EUR). The investigation demonstrates that entanglement decays rapidly with increasing temperature and decoherence strength, whereas trace discord remains resilient over a more comprehensive parameter range. This robustness suggests that PBI dimers can retain useful quantum resources under realistic environmental conditions, highlighting their potential as building blocks for molecular quantum information devices.
Physica Scripta•Feb 21, 2026•1 citation