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Experimental verification of generalized eigenstate thermalization hypothesis in an integrable system

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Light(Science & Applications) 2022年第7期11卷 1615-1624页

作者： Qin-Qin Wang Si-Jing Tao wei-wei pan Zhe Chen Geng Chen Kai Sun Jin-Shi Xu Xiao-Ye Xu Yong-Jian Han Chuan-Feng Li Guang-Can Guo CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China

Identifying the general mechanics behind the equilibration of a complex isolated quantum system towards a state described by only a few parameters has been the focus of attention in non-equilibrium *** several experimentally unproven conjectures are proposed for the statistical description of quantum(non-)integrable *** plausible eigenstate thermalization hypothesis(ETH),which suggests that each energy eigenstate itself is thermal,plays a crucial role in understanding the quantum thermalization in non-integrable systems;it is commonly believed that it does not exist in integrable ***,integrable systems can still relax to the generalized Gibbs *** a microscopic perspective,understanding the origin of this generalized thermalization that occurs in an isolated integrable system is a fundamental open question lacking experimental ***,we experimentally investigated the spin subsystem relaxation in an isolated spin-orbit coupling quantum *** applying the quantum state engineering technique,we initialized the system with various distribution widths in the mutual eigenbasis of the conserved ***,we compared the steady state of the spin subsystem reached in a long-time coherent dynamics to the prediction of a generalized version of ETH and the underlying mechanism of the generalized thermalization is experimentally verified for the first *** results facilitate understanding the origin of quantum statistical mechanics.

关键词： integrable quantum state

Application of Computed Tomographic Colonography in Diagnosis of Colonic Polyps

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Chinese Medical Sciences Journal 2009年第1期24卷 36-40页

作者： Ming-wei Qin wei-dong pan Guan-ning Cong Yun Wang Yun-qing Zhang Ji-xiang Liang Department of Radiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100730 China

Objective To assess the clinical values of computed tomographic colonography （CTC） in diagnosis of colonic polyps. Methods Forty-two patients who were clinically suspicious of colonic polyps or underwent colonic polyps screening received examinations with both CTC and conventional colonoscopy. Sixteen- or 64-slice spiral computed tomography and professional imaging processing techniques were used for evaluation. Per-polyp and per-patient results were analyzed. Those by per-polyp were subsequently divided into ≥10 mm group, 5-10 mm group, and ≤5 mm group. Sensitivity, positive predictive value （PPV）, specificity, negative predictive value （NPV）, and accuracy were calculated using statistical method for diagnostic studies, with conventional colonoscopy as a gold standard. Results Ninety and 61 polyps were found by CTC and conventional colonoscopy, respectively. The per-polyp sensitivity/PPV were 80.3%/55.6% in total, and 100%/92.9%, 93.8%/65.2%, and 68.8%/ 41.5% in the ≥10 mm group, 5-10 mm group, and ≤5 turn group, respectively. The per-patient sensitivity, PPV, specificity, NPV, and accuracy were 97.1%, 89.5%, 42.9%, 75.0%, and 88.1%, respectively. Conclusion CTC can clearly reveal the morphology of colonic polyps and be used as a routine monitoring method for the clinical diagnosis of polyps.

关键词： colonic polyp X-ray computed tomography colonoscopy

Measuring a dynamical topological order parameter in quantum walks

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Light(Science & Applications) 2020年第1期9卷 1932-1942页

作者： Xiao-Ye Xu Qin-Qin Wang Markus Heyl Jan Carl Budich wei-wei pan Zhe Chen Munsif Jan Kai Sun Jin-Shi Xu Yong-Jian Han Chuan-Feng Li Guang-Can Guo CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Max-Planck-Institut fur Physik komplexer Systeme Nöthnitzer Straße 38D-01187 DresdenGermany Institute of Theoretical Physics Technische Universitat Dresden01062 DresdenGermany

Quantum processes of inherent dynamical nature,such as quantum walks,defy a description in terms of an equilibrium statistical physics *** now,identifying the general principles behind the underlying unitary quantum dynamics has remained a key ***,we show and experimentally observe that split-step quantum walks admit a characterization in terms of a dynamical topological order parameter(DTOP).This integer-quantized DTOP measures,at a given time,the winding of the geometric phase accumulated by the wavefunction during a quantum *** observe distinct dynamical regimes in our experimentally realized quantum walks,and each regime can be attributed to a qualitatively different temporal behavior of the *** identifying an equivalent manybody problem,we reveal an intriguing connection between the nonanalytic changes of the DTOP in quantum walks and the occurrence of dynamical quantum phase transitions.

关键词： quantum dynamical topological

USING OF MULTISLICE HELICAL CT COLONOGRAPHY IN PATIENTS WITH MALIGNANT LESIONS OF COLON

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Chinese Medical Sciences Journal 2005年第3期20卷 171-175页

作者： Ming-wei Qin wei-dong pan Guan-ning Cong Yun Wang Yun-qing Zhang Wen-bin Mou Zheng-yu Jin Department of Radiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100730

Objoctive To investigate the techniques and clinical applications ofmultislice helical computed tomography （CT） colonography in colonic lesions. Methods Fifty-nine patients with malignant lesions of colon underwent volume scanning using multislice helical CT. Four types of reconstruction including CT virtual colonoscopy （CTVC）, shaded surface display （SSD）, Raysum, and multiple planar reconstruction （MPR） were used for image post-processing. The results were compared with those of colonoscopy and pathology. Results Multislice helical CT colonography detected 54 colorectal carcinomas, 4 adenomas with focal carcinoma, 1 non-Hodgkin＇s lymphoma （NHL）. The lesions＇ number, size, location, morphology, stricture of intestinal cavity, infiltration, and metastasis were shown satisfactorily by multislice helical CT colonography. Whole colon could be shown in all patients. CT colonography displayed 4 synchronous colonic tumors, 1 ascending colon carcinoma combined with left renal carcinoma among 54 patients with colonic carcinomas. The accuracy of location of CT colonography was 100%. There were 9 cases that CT showed the tumor location was different from the finding of conventional colonoscopy, while all of the CT location were proven exact by operation. CT colonography also displayed the infiltration of serous layer and fatty tissue in 45 cases; 21 cases matched the pathological results in all the 24 cases of suspicious lymph node metastasis, the sensitivity was 87.5%, the specificity was 90.6%; 9 cases hepatic metastasis, 2 ovarian metastasis, and 1 double adrenal gland metastasis. Conclusions Multislice helical CT colonography is effective in preoperative diagnosis, location, stage, and making treatment plan of colorectal carcinoma. It can display the portion not seen during colonoscopy and may have an adjunctive role.

关键词： tomography, X-ray computed colorectal neoplasms image processing, computer assisted

Feasibility of orthotopic fetal liver transplantation:an experimental study

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Hepatobiliary & pancreatic Diseases International 2012年第2期11卷 143-147页

作者： Xian-Ping Zhou,Xue-Ping Zhou,wei-Hua pan,wei Gong,Cheng-Ren Shi and Zhi-wei Quan Department of General Surgery and Department of Pediatric Surgery , Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China [a] Department of General Surgery Xinhua Hospital Shanghai Jiaotong University School of Medicine Shanghai 200092 China Shanghai China [b] Department of Pediatric Surgery Xinhua Hospital Shanghai Jiaotong University School of Medicine Shanghai 200092 China Shanghai China

BACKGROUND:The use of livers from nonviable fetuses is particularly attractive for its potential to solve the current limitations of organ availability for the pediatric ***,it is essential to study the feasibility of orthotopic fetal liver ***:We measured the hepatic and extra-hepatic anatomical structures of fetal and neonatal lambs and established an orthotopic liver transplantation model of the fetal ***:Mean weight of the liver of fetal lambs at 142 to 145 days gestation was 34.75 g and the mean diameter of the portal vein was 3.03 mm,the supra-hepatic vena cava was 5.88 mm,and the infra-hepatic vena cava was 4.00 mm,which matched the corresponding sizes in neonatal lambs aged up to 2 *** standard surgical procedures we completed the vascular inosculation of fetal ***,all the newborn lamb recipients survived less than 24 ***:Orthotopic transplantation of the fetal liver is anatomically and technically ***,perioperative issues need to be resolved prior to clinical application.

关键词： surgical anatomy operative surgery survival time experimental surgery

Molecular Determinants Responsible for the Subcellular Localization of HSV-1 UL4 Protein

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Virologica Sinica 2011年第5期26卷 347-356页

作者： wei-wei pan Jing Long Jun-ji Xing Chun-fu Zheng Molecular Virology and Viral Immunology Research Group State Key Laboratory of Virology Wuhan Institute of Virology Chinese Academy of Sciences Wuhan 430071 China

The function of the herpes simplex virus type 1 （HSV-1） UL4 protein is still elusive. Our objective is to investigate the subcellular transport mechanism of the UL4 protein. In this study, fluorescence microscopy was employed to investigate the subcellular localization of UL4 and characterize the transport mechanism in living cells. By constructing a series of deletion mutants fused with enhanced yellow fluorescent protein （EYFP）, the nuclear export signals （NES） of UL4 were for the first time mapped to amino acid residues 178 to 186. In addition, the N-terminal 19 amino acids are identified to be required for the granule-like cytoplasmic pattem of UL4. Furthermore, the UL4 protein was demonstrated to be exported to the cytoplasm through the NES in a chromosomal region maintenance 1 （CRM1）-dependent manner involving RanGTP hydrolysis

关键词： Herpes simplex virus type 1 (HSV-1) UL4 Subcellular localization Nuclear export signal (NES) Chromosomal region maintenance 1 (CRM 1)

Linear optical approach to supersymmetric dynamics

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Chinese Physics B 2020年第1期29卷 300-306页

作者： Yong-Tao Zhan Xiao-Ye Xu Qin-Qin Wang wei-wei pan Munsif Jan Fu-Ming Chang Kai Sun Jin-Shi Xu Yong-Jian Han Chuan-Feng Li Guang-Can Guo CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China

The concept of supersymmetry developed in particle physics has been applied to various fields of modern *** quantum mechanics,the supersymmetric systems refer to the systems involving two supersymmetric partner Hamiltonians,whose energy levels are degeneracy except one of the systems has an extra ground state possibly,and the eigenstates of the partner systems can be mapped onto each ***,an interferometric scheme has been proposed to show this relationship in ultracold atoms[***.A 96043624(2017)].Here this approach is generalized to linear optics for observing the supersymmetric dynamics with *** time evolution operator is simulated approximately via Suzuki–Trotter expansion with considering the realization of the kinetic and potential terms *** former is realized through the diffraction nature of light and the later is implemented using a phase ***,we propose an interferometric approach which can be implemented perfectly using an amplitude alternator to realize the non-unitary *** numerical results show that our scheme is universal and can be realized with current technologies.

关键词： linear optics supersymmetry quantum simulation

Ceftriaxone-induced immune hemolytic anemia in a case with large vestibular aqueduct syndrome after cochlear implant

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Chinese Medical Journal 2019年第1期132卷 100-102页

作者： Yu Wang Tao pan Fu-Rong Ma Ji-Jun Wang Ke Zhang wei-wei pan Jing-Hui Zhang Zhan-Miao Yi Ying-Qiu Ying Department of Otolaryngology Peking University Third HospitalBeijing 100191China Department of Hematology Peking University Third HospitalBeijing 100191China Department of Pediatrics Peking University Third HospitalBeijing 100191China Department of Pharmacy Peking University Third HospitalBeijing 100191China

To the Editor:Drug-induced immune hemolytic anemia (DIIHA)is a rare but severe ***,a third-generation cephalosporin with a wide antibacterial spectrum and effective antibacterial action,is one of the most common drugs causing DIIHA.^[1]Ceftriaxoneinduced immune hemolytic anemia (CIIHA)is a potentially fatal complication.^[2]Most of the patients were *** reported fatality rate of CIIHA was as high as 40%.

关键词： Ceftriaxone-induced immune hemolytic anemia large vestibular aqueduct syndrome cochlear implant

Reconstruction of heat flux profile on the HL-2A divertor plate with a three-dimensional analysis model

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Chinese Physics B 2013年第1期22卷 389-393页

作者：高金明李伟夏志伟潘宇东卢杰易萍刘仪 Southwestern Institute of Physics

A three-dimensional analysis model based on the finite element method （FEM） is developed, which can derive the evolution and distribution characteristics of heat flux deposited on the divertor plate from the surface temperature measured by infrared thermography diagnostics. The numerical simulations of surface heating due to localized power bursts and the power deposition calculations demonstrate that this analysis can provide accurate results and useful information about localized hot spots compared with the normal one- and two-dimensional calculations. In this paper, the details of this three- dimensional analysis are presented, and some results in ohmic heating and electron cyclotron resonant heating （ECRH） discharge on HL-2A are given.

关键词： three-dimensional analysis heat flux divertor plate