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Hamiltonian Characterization for Dipolar Coupled Spin Systems

Hamiltonian Characterization for Dipolar Coupled Spin Systems
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摘要 Measuring the Hamiltonian of dipolar coupled spin systems is usually a difficult task due to the high complexity of their spectra. Currently, molecules with unknown geometrical structure and low symmetry are extremely tedious or impossible to analyze by sheer spectral fitting. We present a novel method that addresses the problem of spectral analysis and report experimental results of extracting, by spectral fitting, the parameters of an oriented 6-spin system with very low symmetry in structure, without using apriori knowledge or assumptions on the molecular geometry or order parameters. The advantages of our method are achieved with the use of a new spectral analysis algorithm non-assigned frequency optimization of NMR spectra (NAFONS) and by the use of simplified spectra obtained by transition selective pulses. This new method goes beyond the limit of spectral analysis for dipolar coupled spin systems and is helpful for related fields, such as quantum computation and molecular structure analysis.
出处 《Journal of Physical Science and Application》 2014年第6期358-368,共11页 物理科学与应用(英文版)
关键词 Quantum computing Internal Hamiltonian liquid crystal solvent 6-qubit molecule NAFONS NMR simulation dipolar couplings. 自旋系统 哈密顿 偶极 表征 频谱分析 几何结构 低对称性 选择性脉冲
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