Multi-level Purcell effect and the impact of vibrational modes in molecular quantum optics

• URL: http://arxiv.org/abs/2306.09435v1
• Date: Thu, 15 Jun 2023 18:27:40 GMT
• Title: Multi-level Purcell effect and the impact of vibrational modes in molecular quantum optics
• Authors: Charlie Nation, Valentina Notararigo, and Alexandra Olaya-Castro
• Abstract summary: We study a manifestation of the Purcell effect in a bio-inspired photosynthetic dimer. We provide a theoretical picture in terms of an effective non-Hermitian Hamiltonian.
• Score: 62.997667081978825
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The increased decay rate of a two-level system weakly coupled to an optical cavity, known as the Purcell effect, is a cornerstone of cavity QED. However, the effect of cavity coupling is not well understood if the two-level system is replaced by a multi-level interacting system. Motivated by experiments looking to characterise molecular systems via exploiting a cavity interaction, we study a manifestation of the Purcell effect in a bio-inspired photosynthetic dimer. We focus in particular on how molecular vibrational modes, thought to play an important role in photosynthetic exciton transport, impact the system-cavity behaviour in the Purcell regime. We provide a theoretical picture in terms of an effective non-Hermitian Hamiltonian, which extends the simple picture of a Jaynes-Cummings model to the description of a `multi-level' Purcell effect, where different levels have differing Purcell factors, with effective cooperativities mediated by coherent vibrational interactions.

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