상세정보
Export to Refworks부가기능
Quantum Computation: High-fidelity Quantum Gates on Quantum Dot Qubits in the Presence of 1/F Charge Noise Using Strong Drives, Numerical and Analytical Analysis
상세 프로파일
| 자료유형 | 학위논문 |
|---|---|
| 서명/저자사항 | Quantum Computation: High-fidelity Quantum Gates on Quantum Dot Qubits in the Presence of 1/F Charge Noise Using Strong Drives, Numerical and Analytical Analysis. |
| 개인저자 | Yang, Yuan-Chi. |
| 단체저자명 | The University of Wisconsin - Madison. Physics. |
| 발행사항 | [S.l.]: The University of Wisconsin - Madison., 2019. |
| 발행사항 | Ann Arbor: ProQuest Dissertations & Theses, 2019. |
| 형태사항 | 276 p. |
| 기본자료 저록 | Dissertations Abstracts International 81-03B. Dissertation Abstract International |
| ISBN | 9781085734257 |
| 학위논문주기 | Thesis (Ph.D.)--The University of Wisconsin - Madison, 2019. |
| 일반주기 |
Source: Dissertations Abstracts International, Volume: 81-03, Section: B.
Advisor: Coppersmith, Susan N. |
| 이용제한사항 | This item must not be sold to any third party vendors. |
| 요약 | Electrically gated semiconductor quantum dot devices are promising platforms for quantum information processing. Much effort has gone towards achieving high-quality quantum computation using qubits designed in these devices and high-fidelity operations have recently been demonstrated. However, the performance of these qubits is still limited by the decoherence induced by environmental noise. How to combat decoherence is thus essential to further advance the devices. In this thesis, we focus on suppressing the effects of decoherence by operating the system as fast as possible, aiming at finishing the quantum operations long before the quantum information leaves the system. Focusing on double-quantum-dot charge qubits and hybrid qubits, we design high-fidelity single-qubit rotations by using strong ac drives. Based on such strong driving techniques, we predicted that gates with fidelities higher than 99.9% can be achieved in the presence of 1/f charge noise typical of solid state devices. We further propose fast, high-fidelity entangling gates in a pair of exchange-coupled double-quantum-dot hybrid qubits by using tunnel coupling controls, yielding controlled-Z and controlled-NOT gates with fidelities higher than 99.9%.We also investigate recent experiments on a pair of exchange-coupled electron spin qubits and find that control errors and decoherence are the two dominant sources of infidelity. By increasing the gate speed and calibrating the experiments using a gate sequence that we propose, we predict that high-fidelity quantum operations on electron spin qubits are achievable. |
| 일반주제명 | Physics. |
| 언어 | 영어 |
| 바로가기 | 
: 이 자료의 원문은 한국교육학술정보원에서 제공합니다. |
