Transport-Induced Decoherence of the Entangled Triplet Exciton Pair

Our previous paper on high-field dephasing effects investigated the destruction of quantum beats in rubrene due to a statistical accumulation of phases at high-field. This paper examines the entangled triplet-pair in rubrene more generally, and uncovers a similar effect at zero or low fields that causes not dephasing, but decoherence of the entangled wavefunction. Rubrene's particular exciton hopping times cause the change in effective Hamiltonian to be on the order of substate energy, pushing us away from any helpful limiting cases. We therefore use a Monte Carlo simulation to predict quantum beats, and more generally fluorescence enhancement, for any molecular geometry and applied field. DOI: https://doi.org/10.1103/rjsk-kjvf