Nonadiabatic Geometric Quantum Computation with Asymmetric Superconducting Quantum Interference Device
Nonadiabatic Geometric Quantum Computation with Asymmetric Superconducting Quantum Interference Device作者机构：Institute of Modern Physics Northwest University Xi''an 710069 China Galculating Physics Division Department of Computer Teaching Hunan Normal University Changsha 410081 China Institute of Modern Physics Northwest University Xi''an 710069 China Institute of Modern Physics Northwest University Xi''an 710069 China Institute of Modern Physics Northwest University Xi''an 710069 China
出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)
年 卷 期：2002年第37卷第9期
页 面：285-291页
核心收录：
学科分类：08[工学] 081201[工学-计算机系统结构] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：国家自然科学基金 湖南省科技厅基础研究项目
主 题：non-adiabatic geometric phase gate dc-SQUID quantum computation
摘 要：We propose a method of controlling the dc-SQUID (superconducting quantum interference device) system by changing the gate voltages, which controls the amplitude of the fictitious magnetic fields B-z, and the externally applied current that produces the piercing magnetic flux Phi(x) for the dc-SQUID system. We have also introduced a physical model for the dc-SQUID system. Using this physical model, one can obtain the non-adiabatic geometric phase gate for the single qubit and the non-adiabatic conditional geometric phase gate (controlled NOT gate) for the two qubits. It is shown that when the gate voltage and the externally applied current of the dc-SQUID system satisfies an appropriate constraint condition, the charge state evolution can be controlled exactly on a dynamic phase free path. The non-adiabatic evolution of the charge states is given as well.
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