Exploring Vibrationally Assisted Exciton Transfer in Open Quantum Systems with Long-Range Interactions

The medley of coherence and system-environment interactions plays a crucial role in open quantum systems describing several phenomena, from quantum information science to energy transfer (ET) and charge transfer (CT) processes in molecular electronics and photochemical materials. Here, we theoretically and numerically study a Frenkel-exciton model using long-range interacting qubits coupled to a damped, collective bosonic mode to investigate vibrationally assisted ET processes in donor-acceptor systems featuring internal substructures analogous to light-harvesting complexes [1]. In this model, groups of entangled qubits are used to encode excitons (or monomers), and coolant qubits are employed to perform reservoir engineering. In this setting, we find that certain delocalized excitonic states maximize the transfer rate and that the entanglement is preserved during the dissipative transfer over a wide range of parameters. We study the transfer rate efficiency as a function of static disorder in the energy landscape, bath temperature, number of dimerized monomers, and number of qubits per monomer. Finally, we propose an experimental pathway to realize this model in a trapped-ion quantum simulator.



[1] Fallas Padilla, Diego, et al. manuscript in preparation (2025)