Berlin 2024 – scientific programme
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QI: Fachverband Quanteninformation
QI 8: Photons and Photonic Quantum Processors
QI 8.2: Talk
Monday, March 18, 2024, 17:00–17:15, HFT-FT 131
Rigorous treatment of photon propagation between quantized quasinormal mode cavities — •Robert Fuchs1, Juanjuan Ren2, Sebastian Franke1, Stephen Hughes2, and Marten Richter1 — 1Nichtlineare Optik und Quantenelektronik, Institut für Theoretische Physik, TU Berlin, Berlin, Germany — 2Department of Physics, Engineering Physics, and Astronomy, Queen's University, Kingston, Ontario K7L 3N6, Canada
Spatially extended systems consisting of separated quantum emitters or resonators that couple via propagating photons are key to implementations of many quantum technologies, including quantum communication and quantum computing applications. Quasinormal modes (QNMs) are solutions to a Helmholtz equation with open boundary conditions. Hence, QNMs are a powerful tool for calculating the resonances of open optical cavities including dispersive plasmonic nanoparticles.
However, the focus of study so far has mostly been on single cavities or coupled resonators with small spatial separation. We extend the quantized QNM theory to the case of multiple, distant cavities and define parameters to determine when a separate treatment of the individual systems is possible. We also include quantum emitters in the theory. Using a bath of propagating photons, we derive system-bath correlation functions to rigorously describe the time delayed interactions between the QNM cavities and quantum emitters that give rise to feedback-induced phenomena.
Keywords: Cavity QED; Quasinormal modes; Quantum networks; Entanglement