Pure dephasing induced single-photon parametric down-conversion in an ultrastrong coupled plasmon-exciton system

• URL: http://arxiv.org/abs/2207.12293v1
• Date: Mon, 25 Jul 2022 16:03:18 GMT
• Title: Pure dephasing induced single-photon parametric down-conversion in an ultrastrong coupled plasmon-exciton system
• Authors: Ruben Pompe, Matthias Hensen, Matthew Otten, Stephen K. Gray and Walter Pfeiffer
• Abstract summary: In coupled quantum systems pure dephasing mechanisms acting on one constituent of the hybrid system break symmetry. Fast pure dephasing of the exciton is shown to support photon pair generation as the dominant energy relaxation pathway.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In coupled quantum systems pure dephasing mechanisms acting on one constituent of the hybrid system break symmetry and enable optical transitions which are forbidden in the non-coupled system, i.e., the pure dephasing bath opens a cascaded dissipation pathway. Here we show that this mechanism enables single-photon induced parametric down-conversion in an ultrastrongly coupled plasmon-exciton system. Fast pure dephasing of the exciton is shown to support photon pair generation as the dominant energy relaxation pathway.

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