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[PAST EVENT] Physics Dissertation - Ziqi Niu
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Ziqi Niu, “Development of Quantum Information and Sensing Tools Based on Four-Wave Mixing in Hot Rubidium Vapor”
Abstract:
Quantum correlated optical fields are crucial in quantum information and sensing applications. Nonlinear optics serves as a primary mechanism for generating these correlated fields. This dissertation focuses on a specific nonlinear interaction known as Four-Wave Mixing(FWM) achieved in warm atom ensemble and its applications. We developed a bi-chromatic continuous variable entangled-photon source, aimed at enhancing long-distance quantum communication, and examined the conditions that optimize its performance. Our findings contribute to the advancement of a continuous variable-discrete variable (CV-DV) hybrid quantum computing device. Additionally, we expanded the study of Four-Wave Mixing squeezing within the context of non-Hermitian physics, which holds implications for quantum simulation and non-Hermitian sensors. Lastly, we enhanced the conventional homodyne method by incorporating spatial resolution, achieving few-photon imaging through quantum noise and pushing the boundary of quantum imaging.
Bio:
Ziqi Niu was born in Taiyuan, China. He graduated from Bucknell University with a B.Sc in Physics. He joined College of William & Mary in 2019 to work on Quantum Optics.
Sponsored by: Physics