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Topological phases and edge modes of an uneven ladder

Chinese Physics B 2024年第8期33卷 154-168页

作者：商文创韩熠宁 shimpei endo 高超 Department of Physics Zhejiang Normal UniversityJinhua 321004China Key Laboratory of Optical Information Detection and Display Technology of Zhejiang Zhejiang Normal UniversityJinhua 321004China Department of Engineering Science The University of Electro-CommunicationsTokyo 182-8585Japan

We investigate the topological properties of a two-chain quantum ladder with uneven legs,i.e.,the two chains differ in their periods by a factor of *** an uneven ladder presents rich band structures classified by the closure of either direct or indirect *** also provides opportunities to explore fundamental concepts concerning band topology and edge modes,including the difference of intracellular and intercellular Zak phases,and the role of the inversion symmetry(IS).We calculate the Zak phases of the two kinds and find excellent agreement with the dipole moment and extra charge *** also find that configurations with IS feature a pair of degenerate two-side edge modes emerging as the closure of the direct bandgap,while configurations without IS feature one-side edge modes emerging as not only the closure of both direct and indirect bandgaps but also within the band ***,by projecting to the two sublattices,we find that the effective Bloch Hamiltonian corresponds to that of a generalized Su–Schrieffer–Heeger model or the Rice–Mele model whose hopping amplitudes depend on the *** this way,the topological phases can be efficiently extracted through winding *** propose that uneven ladders can be realized by spin-dependent optical lattices and their rich topological characteristics can be examined by near future experiments.

关键词： ladder model symmetry-protected topological phase topological invariant bulk-boundary correspondence

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Comparison of the low-density lipoprotein cholesterol target value and the preventive effect of statins in elderly patients and younger patients

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Journal of Geriatric Cardiology 2017年第6期14卷 383-391页

作者： Akihiro endo Taiji Okada Misun Pak Yuzo Kagawa shimpei Ito Hirotomo Sato Kenji Kageshima Yasuyuki Yoshida Kazuaki Tanabe Division of Cardiology Shimane University Faculty of Medicine Izumo Japan Division of Cardiology Tottori Prefectural Central Hospital Tottori Japan

Objective To assess whether the low-density lipoprotein cholesterol （LDL-C） target value and preventive effect of statins are different between elderly and younger patients. Methods We investigated 304 patients with previous percutaneous coronary intervention who underwent coronary angiography from January 2007 to December 2016 for examination of recurrent ischemia beyond the early restenosis. Patients were classified into two groups： age ≥ 75 years （elderly group： n = 140） and 〈 75 years （younger group： n = 164）. Relationships between the achieved LDL-C level, incidence of late coronary events, and the effectiveness of statins were evaluated. Results During follow-up, 179 patients underwent late coronary revascularization. Recurrent ischemia presenting as acute coronary syndrome （ACS） occurred in 83 cases. Kaplan-Meier curve analysis revealed that in the younger group, recurrent ACS was significantly lower in patients with LDL-C 〈 70 mg/dL than in those with LDL-C ranging from 70 to 〈 100 mg/dL （P = 0.035）; however, there was no difference between these in the elderly group （P = 0.863）. Instead, recurrent ACS was less frequent in patients with LDL-C ranging from 70 mg/dL to 〈 100 mg/dL than in those with LDL-C ≥ 100 mg/dL in the elderly group （v = 0.033）. Statin use was associated with decreased recurrent ACS （P = 0.005）; moreover, only using statins was an independent predictor in the elderly group （HR： 0.375; P = 0.007）. Conclusions Strict control of LDL-C to 〈 70 mg/dL was effective for reducing the incidence of recurrent ACS in younger patients. However, LDL-C 〈 100 mg/dL might be sufficient as the target value of LDL-C-lowering therapy for secondary prevention of ischemic events in Japanese elderly patients.

关键词： Acute coronary syndrome Late coronary event Prevention

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俯卧位采集和CT衰减校正在CZTSPECT显像检测冠状动脉疾病中的比较

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中华核医学与分子影像杂志 2018年第4期38卷 304-304页

作者：唐军 shimpei Ito Akihiro endo Taiji Okada Taku Nakamura Takashi Sugamori Nobuyuki Takahashi Hiroyuki Yoshitomi Kazuaki Tanabe 上海交通大学医学院附属苏州九龙医院核医学科 215021 Division of Cardiology Shimane University Faculty of Medicine Izumo Japan

【摘要】目的带碲-锌-镉（CZT）固态探测器的核素显像仪可更好地诊断和评估胸痛患者，但其与普通γ照相机一样存在下壁和（或）下侧壁的衰减现象。在常规仰卧位采集图像的基础上加做CT衰减校正（CTAC）和俯卧位图像采集，来分析比较仰... 详细信息

【摘要】目的带碲-锌-镉（CZT）固态探测器的核素显像仪可更好地诊断和评估胸痛患者，但其与普通γ照相机一样存在下壁和（或）下侧壁的衰减现象。在常规仰卧位采集图像的基础上加做CT衰减校正（CTAC）和俯卧位图像采集，来分析比较仰卧位显像、仰卧位＋CTAC和俯卧位显像的结果。

关键词：图像采集显像检测衰减校正冠状动脉疾病俯卧位 CT 仰卧位 γ照相机

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