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Confining Electrons on Helium in Quantum Dots
Confining Electrons on Helium in Quantum Dots
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152834
- ISBN
- 9798346759683
- DDC
- 530.1
- 서명/저자
- Confining Electrons on Helium in Quantum Dots
- 발행사항
- [Sl] : Princeton University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 117 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-06, Section: B.
- 주기사항
- Advisor: Lyon, Stephen A.
- 학위논문주기
- Thesis (Ph.D.)--Princeton University, 2024.
- 초록/해제
- 요약Quantum computing with electron spins requires the precise manipulation and detection of the electron charge state. Electrons on helium has lacked in this regard, opting to use deep channel, micron sized gates to address electrons while utilizing exotic methods for electron sensing. This thesis focuses on the feasibility of trapping and controlling electrons in submicron quantum dots, developing an all-electrical cryogenic amplifier circuit for electron sensing, transporting small packets of electrons over thin helium films, and measuring the spin degree of freedom of 109 spins over superfluid helium.The first portion of the thesis describes an experiment exploring the use of an array of 750,000 dual layer lithographically defined 200 nanometer quantum dots to trap electrons. We find that these quantum dots can support 10s of electrons but also acknowledge that a change in device structure needs to be made to allow for more experimental repeatability. In the end, this experiment highlighted the need to transition to thin film devices and more sensitive measurement techniques. The second portion of this thesis focuses on a novel device design that allows for a gentle transition between thick and thin helium films. The use of a smooth amorphous resistive metal allows us to drive electrons across the thin helium surface with reasonable voltages; and by integrating this with our take on a cryogenic amplifier circuit using High Electron Mobility Transistors, we can measure the mobilities of small packets of electrons. We find that these results are in good agreement with previous measurements of mobilities of many (106) electrons over bulk helium films at the temperatures we work in.The last portion of this thesis details our attempt to measure the spin coherence and lifetimes of electrons floating on helium using a 3D Cavity. The complexities associated with integrating these two wildly different systems together required a novel approach to sample motion at cryogenic temperatures. We detail the thought process and implementation of this new setup that preserves over 95% of 2 inches of room temperature motion at cryogenic temperatures.
- 일반주제명
- Quantum physics
- 일반주제명
- Condensed matter physics
- 일반주제명
- Electrical engineering
- 일반주제명
- Computational physics
- 키워드
- Electron spins
- 기타저자
- Princeton University Physics
- 기본자료저록
- Dissertations Abstracts International. 86-06B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152834
■006m o d
■007cr#unu||||||||
■020 ▼a9798346759683
■035 ▼a(MiAaPQ)AAI31561186
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530.1
■1001 ▼aFeldman, Mayer Martin.▼0(orcid)0000-0002-8181-449X
■24510▼aConfining Electrons on Helium in Quantum Dots
■260 ▼a[Sl]▼bPrinceton University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a117 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-06, Section: B.
■500 ▼aAdvisor: Lyon, Stephen A.
■5021 ▼aThesis (Ph.D.)--Princeton University, 2024.
■520 ▼aQuantum computing with electron spins requires the precise manipulation and detection of the electron charge state. Electrons on helium has lacked in this regard, opting to use deep channel, micron sized gates to address electrons while utilizing exotic methods for electron sensing. This thesis focuses on the feasibility of trapping and controlling electrons in submicron quantum dots, developing an all-electrical cryogenic amplifier circuit for electron sensing, transporting small packets of electrons over thin helium films, and measuring the spin degree of freedom of 109 spins over superfluid helium.The first portion of the thesis describes an experiment exploring the use of an array of 750,000 dual layer lithographically defined 200 nanometer quantum dots to trap electrons. We find that these quantum dots can support 10s of electrons but also acknowledge that a change in device structure needs to be made to allow for more experimental repeatability. In the end, this experiment highlighted the need to transition to thin film devices and more sensitive measurement techniques. The second portion of this thesis focuses on a novel device design that allows for a gentle transition between thick and thin helium films. The use of a smooth amorphous resistive metal allows us to drive electrons across the thin helium surface with reasonable voltages; and by integrating this with our take on a cryogenic amplifier circuit using High Electron Mobility Transistors, we can measure the mobilities of small packets of electrons. We find that these results are in good agreement with previous measurements of mobilities of many (106) electrons over bulk helium films at the temperatures we work in.The last portion of this thesis details our attempt to measure the spin coherence and lifetimes of electrons floating on helium using a 3D Cavity. The complexities associated with integrating these two wildly different systems together required a novel approach to sample motion at cryogenic temperatures. We detail the thought process and implementation of this new setup that preserves over 95% of 2 inches of room temperature motion at cryogenic temperatures.
■590 ▼aSchool code: 0181.
■650 4▼aQuantum physics
■650 4▼aCondensed matter physics
■650 4▼aElectrical engineering
■650 4▼aComputational physics
■653 ▼aElectron spins
■653 ▼aElectrons on helium
■653 ▼aQuantum computing
■653 ▼aQuantum information
■653 ▼aHigh Electron Mobility Transistors
■690 ▼a0599
■690 ▼a0611
■690 ▼a0544
■690 ▼a0216
■71020▼aPrinceton University▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g86-06B.
■790 ▼a0181
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164123▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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