# Design and Simulation of a Superconducting Qubit

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# Design and Simulation of a Superconducting Qubit

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Master Thesis
(2025)

Author(s)

[Y. Gao](https://repository.tudelft.nl/person/Person_f596baa8-478c-45d0-bb75-d6a36a4f6f3e)
(TU Delft - Electrical Engineering, Mathematics and Computer Science)

Contributor(s)

Alexander Yarovoy
– Mentor
(TU Delft - Microwave Sensing, Signals & Systems)

[S.N. Haider](https://repository.tudelft.nl/person/Person_3a775321-9eba-4953-88a1-4e771294c1a1)
– Mentor
(TU Delft - QCD/Haider Group)

[M. Spirito](https://repository.tudelft.nl/person/Person_f088ff11-4233-4537-9fad-9643b4066099)
– Graduation committee member
(TU Delft - Electronics)

Faculty

Electrical Engineering, Mathematics and Computer Science

Transmon qubits
Electromagnetic Analysis
Capacitance
Superconducting qubits

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Publication Year

2025

Language

English

Graduation Date

29-08-2025

Awarding Institution

Delft University of Technology

Programme

['Electrical Engineering | Microelectronics']

Faculty

Electrical Engineering, Mathematics and Computer Science

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## Abstract

Quantum bits (qubits) are regarded as the building blocks of a quantum computer, which have significant implications in quantum information science. The superconducting qubit is a solid platform for quantum computing, where the Transmon qubit based on the Josephson junction or the SQUID structure is widely designed and researched. Microwave design and electromagnetic simulation of a superconducting qubit is a crucial way to determine and enhance the qubit performance in reality. The geometry of a superconducting qubit structure should be optimized to achieve the desired equivalent capacitance and consequently the resonant frequency through the external magnetic flux adjustment. In this thesis, a special superconducting qubit for lower energy loss named 'Pokemon' qubit is analyzed, with the role of different capacitance geometry in the qubit studied. This thesis also presented a comparative analysis between the in-plane capacitive structure and the flip-chip capacitance. The results pave the way for future modular quantum processing units utilizing flip-chip technology.

## Files

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