자료유형  

 학위논문

Control Number  

0017160472

International Standard Book Number  

9798383565469

Dewey Decimal Classification Number  

530.1

Main Entry-Personal Name  

Curtis, Jacob Charles.

Publication, Distribution, etc. (Imprint  

[S.l.] : Yale University., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

238 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-02, Section: B.

General Note  

Advisor: Schoelkopf, Robert J.

Dissertation Note  

Thesis (Ph.D.)--Yale University, 2024.

Summary, Etc.  

요약Superconducting cavities coupled to transmon ancillae are a promising platform for fault-tolerant quantum computation. This pairing produces universal control over a long-lived bosonic mode, in whose many levels we encode a logical qubit or physical quantum system, such as the vibrational modes of a molecule. However, unwanted static interactions and spurious couplings to the environment limit the accuracy of computations. In this dissertation, we tackle each of these error sources in turn. Our solutions exploit the ability of the transmon to perform high-fidelity measurements of the cavity mode without disturbing its stored information. First, we present our efforts to reduce the residual cavity non-linearity, which causes dephasing in many quantum codes. We discuss multiple methods to measure the non-linearity and show that our mitigation technique can fully cancel cavity self-Kerr. Next, we construct a new photon-number resolving measurement that extracts multiple bits of information from the cavity in a single shot using multiple transmon measurements. The errors that occur in this measurement have a predictable form and can be inverted to reduce ensemble error by an order of magnitude. Finally, we develop and demonstrate a gate that detects errors in real time. The resources required for fault-tolerance are high, but can be relaxed if the goal is only to detect, but not correct errors. Our error-detected gate reaches a fidelity of 0.9995 driven by improvements in numerical gate optimization and transmon three level control.

Subject Added Entry-Topical Term  

Quantum physics.

Index Term-Uncontrolled  

Error detection

Index Term-Uncontrolled  

Quantum computing

Index Term-Uncontrolled  

Quantum measurement

Index Term-Uncontrolled  

Quantum simulation

Added Entry-Corporate Name  

Yale University Physics

Host Item Entry  

Dissertations Abstracts International. 86-02B.

Electronic Location and Access  

로그인을 한후 보실 수 있는 자료입니다.

Control Number  

joongbu:657057