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Abstract: Bosonic systems, such as 3D λ/4 coaxial cavities and 2D λ/2 coplanar waveguide resonators, are quantum harmonic oscillators that encode information in phase space, offering a hardware-efficient route toward quantum error correction (QEC) and simulation in superconducting circuits. In this thesis, we present the design, characterization, and simulation of a dual-rail processor constructed with 2D λ/2 coplanar waveguide resonators, demonstrating agreement between experimental and theoretical results within a range of 3%–10%. By integrating both closed-source and open-source software tools, we develop an efficient workflow for extracting critical system parameters and simulating quantum dynamics. Our approach provides insight into a planar design layout of a fully planar dual-rail architecture, contributing to the development of scalable, fault-tolerant quantum processors.

Thesis Committee: Mattias Fitzpatrick (Chair), Jifeng Liu, Laura Ray, Rufus Boyack