郭斯彥臺灣大學：電機工程學研究所朱瑋中Chu, Wei-ChungWei-ChungChu2007-11-262018-07-062007-11-262018-07-062006http://ntur.lib.ntu.edu.tw//handle/246246/53169The physical implementation of quantum computers using a nucleus magnetic resonance (NMR) method is mature nowadays. However, not many people can practically exercise the theory of the implemental techniques. Therefore, people couldn’t easily apply the algorithms on quantum computing for mass production. Based on the accumulated experience on implementing quantum computers, we are able to perform computation operations by commanding a NMR machine to give certain pulses on atoms to make changes in spinning state that implicitly contains some quantum information. To achieve hierarchical programming, a NMR pulse program generator is designed and implemented to acts as a transformer for high-level and low-level languages used in quantum computers. This device generates pulse programs for the needed quantum circuits and carries out algorithms easily without the implementation technology. By simply applying quantum gate sequence (e.g. CN-gate) as input, pulse program containing instructions and parameters for the NMR spectrometer could be generated without too much overhead and efforts. In the past, NMR experiments often involve lengthy and sophisticated pulse program that a need for an automatic generator is highly anticipated. In other words, the proposed NMR pulse program generator is somehow like a friendly communicator that lies between human and the machine, it allows efficient pulse program generation and avoid artificial errors. The proposed generator is based on the liquid-state NMR quantum computer, and mainly generates executing instructions for those using carbon and hydrogen as the core material. Having the material’s states and parameters from different experiments as input, it expands to a customized tool that is more general with less restrictions. So far through the experiments for two-bit and seven-bit quantum computers with different materials, it makes the fundamental logics on quantum computing. When working with a high-level language for quantum computer, programming might be as convenient as in classical computing.誌謝 i ABSTRACT ii Figure Captions iv Table Captions v Chapter 1 Introduction 1 1.1 Review of our works 1 1.2 Thesis organization 3 Chapter 2 Fundamentals of Quantum Computer 4 2.1 Quantum state 4 2.1.1 Entanglement 5 2.2 Quantum gate 6 2.3 University 11 Chapter 3 Implementation of Quantum Computer 13 3.1 Divincenzo Criteria 13 3.2 Material and hardware 15 3.3 Coupling and selective pulse 17 3.4 Decoupling 20 3.5 Quantum circuits 24 3.5.1 Not-gate 24 3.5.2 Hadamard-gate 25 3.5.3 CN-gate 25 3.6 Selective re-coupling and frame rotation 27 3.6.2 Review of CN-gate 31 Chapter 4 Quantum Computer Physical Language Generator with NMR 32 4.1 Introduction to quantum programming language 32 4.2 Structure 35 4.3 Configuration and interface 37 4.4 Experiments with NMRPPGEN 41 Chapter 5 Conclusions 43 Bibliography 45en-US量子電腦量子電腦實作Quantum computerthesis