Theoretical Modeling of Superradiant and Subradiant Photoluminescence in Pairs of Lifetime-Limited Organic Molecules

We present numerical calculations of the cooperative photoluminescence spectra of two dipole–dipole–coupled dibenzoterrylene molecules embedded in an anthracene crystal at liquid-helium temperature. Using master-equation formalism for non-identical two-level emitters, we reproduce the excitation spectra recently observed in experiment. The excellent agreement between the simulations, analytical model, and measurements confirms the observation of controllable molecular entanglement and validates the theoretical framework. The approach provides an efficient computational tool for predicting and controlling cooperative photoluminescence in solid-state molecular systems. These results establish a basis for future experiments aimed at achieving optical entanglement of organic molecules and developing quantum photonic devices.