High Fidelity Universal Gates Performed on a Continuously-Decoupled Coherence Enhanced Transmon Qubit

<p>Decoherence is the primary limiting factor for the utility of modern qubits and qubit networks; most chiefly, pure dephasing which limits the operational time any gate-sequence can produce a high-fidelity result. In this dissertation, I present the results of my experiment, performing fast, high fidelity, universal single-qubit gates, on a qubit which has been decoupled from pure dephasing resulting from environmental noise. This technique can expand operational ranges of qubits–such as allowing the high-coherence operation of a flux-tunable qubit far away from its flux-insensitive sweet-spot; broadening our selection of viable qubits by making otherwise low-coherence qubits operable with high coherence, or improving the coherence of higher order quantum networks which have limited coherence time due to qubit to qubit interactions producing prohibitive amounts of pure dephasing. This technique could be performed on any deterministic qubit of any modality which can receive drives of a physically similar kind as my particular test-platform, the superconducting transmon.

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year

2022

Author dc:creator

• Senatore, Michael

Contributors dc:contributor

• Franck, John
• Plourde, Britton

• Continuous Decoupling
• Dynamical Decoupling
• Quantum Computing
• Spin locking
• Superconducting Qubits
• Transmon
• Quantum Physics

Repository record dc:identifier

https://surface.syr.edu/etd/1602

OAI identifier oai:identifier

oai:surface.syr.edu:etd-2603