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

• URL: http://arxiv.org/abs/2502.04383v1
• Date: Wed, 05 Feb 2025 19:00:40 GMT
• Title: Vibrationally Assisted Exciton Transfer in Open Quantum Systems with Long-Range Interactions
• Authors: Diego Fallas Padilla, Visal So, Abhishek Menon, Roman Zhuravel, Han Pu, Guido Pagano,
• Abstract summary: In this work, we use a Frenkel-exciton model with long-range interacting qubits coupled to a damped collective bosonic mode to investigate vibrationally assisted transfer processes. We find that certain delocalized excitonic states maximize the transfer rate and that the entanglement is preserved during the dissipative transfer.
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• Abstract: The interplay between coherence and system-environment interactions is at the basis of a wide range of phenomena, from quantum information processing to charge and energy transfer in molecular systems, biomolecules, and photochemical materials. In this work, we use a Frenkel-exciton model with long-range interacting qubits coupled to a damped collective bosonic mode to investigate vibrationally assisted transfer processes in donor-acceptor systems featuring internal substructures analogous to light-harvesting complexes. 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 investigate the transfer reduction by static disorder and by finite temperature and study how transfer efficiency scales as a function of the number of dimerized monomers and the component number of each monomer, finding which excitonic states lead to optimal transfer. Finally, we provide a realistic experimental setting to realize this model in analog trapped-ion quantum simulators. Analog quantum simulation of systems comprising many and increasingly complex monomers could offer valuable insights into the design of light-harvesting materials, particularly in the non-perturbative intermediate parameter regime examined in this study, where classical simulation methods are resource-intensive.

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