Extensible Architecture for Superconducting Quantum Computing

Quantum Computing;CQED;Superconducting Qubits;Quantum Socket;Coherent Leakage;Quantum information architectures;Superconducting Microwave Engineering

McConkey, Thomasadvisor:Majedi, Hamed ; affiliation1:Faculty of Engineering ; advisor:Mariantoni, Matteo ; Majedi, Hamed ; Mariantoni, Matteo ;

University of Waterloo

关键词: Quantum Computing;    Superconducting Qubits;    CQED;    Quantum information architectures;    Coherent Leakage;    Quantum Socket;    Doctoral Thesis;    Superconducting Microwave Engineering;   

Others  :  https://uwspace.uwaterloo.ca/bitstream/10012/13464/3/McConkey_Thomas.pdf

瑞士|英语

来源: UWSPACE Waterloo Institutional Repository

【 摘 要 】

Quantum computing architectures with ten or more quantum bits (qubits) have been implemented using trapped ions and superconducting devices. The next milestone in the quest for a quantum computer is the realization of quantum error correction codes. Such codes will require a large number of qubits that must be controlled and measured by means of classical electronics. This scaling up leads to a number of problems and sources of error that must be accounted for in order to have an operational system.One architectural aspect requiring immediate attention is the realization of a suitable interconnect between the quantum and classical hardware. Our proposed solution to this wiring problem is the quantum socket, a three-dimensional wiring method for qubits with superior performance as compared to two-dimensional methods based on wire bonding. The quantum socket also provides a means to counteract another scaling problem, the coupling of qubits to unwanted cavity modes resulting in coherent leakage error. By following our proposed wiring methodologies, half-wave fencing or antinode pinning, we show how the error due to leakage can be mitigated to orders of magnitude below current state-of-the-art error probabilities.