Evidence of non-Gaussianity in microrings
#Quantum
#Entanglement
#PhaseEstimation
#QuantumComputing
Abstract: The undepleted pump approximation is typically valid for squeezed light generation in microring resonators with a third-order nonlinearity, such as silicon nitride (SiN), because the process is not efficient enough to significantly deplete the pump. However, recent work on second-order nonlinear processes in indium gallium phosphide (InGaP) microrings has demonstrated high conversion efficiency of the pump, suggesting that the undepleted pump approximation may no longer hold in such cases. In this talk, I will present recent theoretical and numerical results on spontaneous parametric downconversion (SPDC) in InGaP microrings, where we find evidence of non-Gaussianity arising from the efficient conversion of pump photons into signal and idler photons. This work opens a path toward the deterministic generation of non-Gaussian states on-chip.
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- Date: 15 May 2025
- Time: 03:00 PM UTC to 04:00 PM UTC
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- J. Armand Bombardier J-1035, Polytechnique Montréal
- Montréal, Quebec
- Canada H3T 1J4
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Contact: nicolas.quesada@polymtl.ca
- Co-sponsored by Prof. Nicolas Quesada
- Starts 03 May 2025 06:00 PM UTC
- Ends 15 May 2025 01:00 PM UTC
- No Admission Charge
Speakers
Colin Vendromin of University of Toronto
Topic:
Evidence of non-Gaussianity in microrings
Abstract: The undepleted pump approximation is typically valid for squeezed light generation in microring resonators with a third-order nonlinearity, such as silicon nitride (SiN), because the process is not efficient enough to significantly deplete the pump. However, recent work on second-order nonlinear processes in indium gallium phosphide (InGaP) microrings has demonstrated high conversion efficiency of the pump, suggesting that the undepleted pump approximation may no longer hold in such cases. In this talk, I will present recent theoretical and numerical results on spontaneous parametric downconversion (SPDC) in InGaP microrings, where we find evidence of non-Gaussianity arising from the efficient conversion of pump photons into signal and idler photons. This work opens a path toward the deterministic generation of non-Gaussian states on-chip
Biography:
Bio: Colin Vendromin is currently a postdoc at the University of Toronto working on theoretical nonlinear quantum optics and an intern at Xanadu in Toronto. He received his PhD in physics from Queens University in 2022 under the supervision of Marc M Dignam, and his MSc in physics from Brock University in 2017.