Role of time-frequency correlations in two-photon-two-atom resonance energy transfer

Authors

  • Roberto de J. León-Montiel Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México

Abstract

Since 2004, there exists a long standing discussion on the role that frequency anti-correlation and entanglement, as well as time-ordered excitation pathways, plays in the energy transfer from a two-photon donor to an acceptor comprising two non-interacting two-level particles. In this talk, I will present a general model for describing the joint excitation of two non-interacting two-level particles with photon pairs produced by Spontaneous Parametric Down Conversion (SPDC). We will see that while strong frequency anti-correlation between photons guarantees a large two-photon excitation (TPE) probability, photons bearing a sine cardinal spectral shape (the joint photon spectrum that is naturally produced during the SPDC process) exhibit a ~3.8 times larger TPE signal than photons with a Gaussian spectrum. More importantly, and in stark contrast to previous authors, we will see that suppression of time-ordered excitation pathways does not substantially modify the TPE probability for two-photon states with a Gaussian spectral shape; whereas photons with a sine cardinal spectrum exhibit the strongest TPE signal of all when two-photon excitation pathways are not suppressed. Our results not only help elucidating the role of time-frequency correlations in resonance energy transfer with SPDC photons, but also provide valuable information regarding the optimal source to be used in its experimental verification.

Author Biography

  • Roberto de J. León-Montiel, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México

    Roberto de J. León-Montiel is an Associate Professor at the Institute of Nuclear Sciences of the National Autonomous University of Mexico (UNAM). His current research interests lie at the intersection of quantum optics, chemical physics, materials science and machine learning. From 2018 to 2021, he was the President of the OPTICA's (formerly known as OSA -- Optical Society of America) Quantum Computing and Communication Technical Group. He is currently a board member of the Quantum Information Division of the Mexican Physical Society and member of the scientific committee of the Conference on Laser and Electro-Optics (CLEO), one of the most important conferences on optics and photonics worldwide.

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Published

2025-06-25

Issue

2025: Proceedings of the 43rd Samahang Pisika ng Pilipinas Physics Conference

Section

Invited Presentations

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How to Cite

[1]
“Role of time-frequency correlations in two-photon-two-atom resonance energy transfer”, Proc. SPP, vol. 43, no. 1, p. SPP-2025-INV-PS-22, Jun. 2025, Accessed: Mar. 31, 2026. [Online]. Available: https://proceedings.spp-online.org/article/view/SPP-2025-INV-PS-22