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Fast nuclear-spin gates and electrons−nuclei entanglement of neutral atoms in weak magnetic fields

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Frontiers of physics 2024年第2期19卷 179-203页

作者： xiao-feng shi School of Physics Xidian UniversityXi’an 710071China

We present a novel class of Rydberg-mediated nuclear-spin entanglement in divalent atoms with global laser ***,we show a fast nuclear-spin controlled phase gate of an arbitrary phase realizable either with two laser pulses when assisted by Stark shifts,or with three ***,we propose to create an electrons−nuclei-entangled state,which is named a super bell state(SBS)for it mimics a large Bell state incorporating three small Bell ***,we show a protocol to create a three-atom electrons-nuclei entangled state which contains the three-body W and Greenberger−Horne−Zeilinger(GHZ)states *** protocols possess high intrinsic fidelities,do not require single-site Rydberg addressing,and can be executed with large Rydberg Rabi frequencies in a weak,Gauss-scale magnetic *** latter two protocols can enable measurement-based preparation of Bell,hyperentangled,and GHZ states,and,specifically,SBS can enable quantum dense coding where one can share three classical bits of information by sending one particle.

关键词： nuclear-spin qubit electrons−nuclei entanglement super Bell state Greenberger−Horne−Zeilinger state Rydberg-mediated entanglement quantum dense coding

Construction and Verification of a Simple Smooth Chaotic System

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Communications in Theoretical Physics 2007年第2X期48卷 267-274页

作者： ZHANG xiao-Dan shi feng WANG Zhen School of Applied Science University of Science and Technology Beijing Beijing 100083 China

This article introduces a new chaotic system of three-dimensional quadratic autonomous ordinary differential equations, which can display different attractors with two unstable equilibrium points and four unstable equilibrium points respectively. Dynamical properties of this system are then studied. Furthermore, by applying the undetermined coefficient method, heteroclinic orbit of shil＇nikov＇s type in this system is found and the convergence of the series expansions of this heteroclinic orbit are proved in this article. The shil＇nikov＇s theorem guarantees that this system has Smale horseshoes and the horseshoe chaos.

关键词： chaotic attractors three-dimensional quadratic autonomous dynamical system equilibrium point

Immunomodulation of adipose-derived mesenchymal stem cells on peripheral blood mononuclear cells in colorectal cancer patients with COVID-19

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 2113-2122页

作者： Jun-feng Wang xiao-Xia Yang Jian Zhang Yan Zheng Fu-Qing Zhang xiao-feng shi Yu-Liang Wang Department of Colorectal Oncology Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerTianjin’s Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjin 300060China Department of Neurology Tianjin First Center HospitalTianjin 300192China Prosthodontics Studio Tianjin Stomatological HospitalTianjin 300041China Department of Clinical Laboratory Medicine Tianjin Institute of UrologyThe Second Hospital of Tianjin Medical UniversityTianjin 300211China Department of Emergency Tianjin First Central HospitalTianjin 300192China

BACKGROUND Accumulating evidence has shown that adipose tissue-derived mesenchymal stem cells(ADSCs)are an effective therapeutic approach for managing coronavirus disease 2019(COVID-19);however,further elucidation is required to determine their underlying immunomodulatory effect on the mRNA expression of T helper cell-related transcription factors(TFs)and cytokine release in peripheral blood mononuclear cells(PBMCs).AIM To investigate the impact of ADSCs on the mRNA expression of TFs and cytokine release in PBMCs from colorectal cancer(CRC)patients with severe COVID-19(CRC^(+)patients).METHODS PBMCs from CRC^(+)patients(PBMCs-C+)and age-matched CRC patients(PBMCs-C)were stimulated and cultured in the presence/absence of *** mRNA levels of T-box TF TBX21(T-bet),GATA binding protein 3(GATA-3),RAR-related orphan receptor C(RORC),and forkhead box P3(FoxP3)in the PBMCs were determined by reverse transcriptase-polymerase chain *** supernatants were evaluated for levels of interferon gamma(IFN-γ),interleukin 4(IL-4),IL-17A,and transforming growth factor beta 1(TGF-β1)using an enzyme-linked immunosorbent *** Compared with PBMCs-C,PBMCs-C+exhibited higher mRNA levels of T-bet and RORC,and increased levels of IFN-γ and ***,a significant decrease in FoxP3 mRNA and TGF-β1,as well as an increase in Tbet/GATA-3,RORC/FoxP3,IFN-γ/IL-4,and IL-17A/TGF-β1 ratios were observed in PBMCs-C+.Furthermore,ADSCs significantly induced a functional regulatory T cell(Treg)subset,as evidenced by an increase in FoxP3 mRNA and TGF-β1 release *** was accompanied by a significant decrease in the mRNA levels of T-bet and RORC,release of IFN-γ and IL-17A,and T-bet/GATA-3,RORC/FoxP3,IFN-γ/IL-4,and IL-17A/TGF-β1 ratios,compared with the PBMCs-C+*** The present in vitro studies showed that ADSCs contributed to the immunosuppressive effects on PBMCs-C+,favoring Treg ***,ADSC-based cell therapy could be a beneficial approach for p

关键词： Colorectal cancer COVID-19 Adipose-derived mesenchymal stem cells T helper cell Immunomodulation

Multiple solutions and hysteresis in the flows driven by surface with antisymmetric velocity profile

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Chinese Physics B 2021年第9期30卷 83-88页

作者： xiao-feng shi Dong-Jun Ma Zong-Qiang Ma De-Jun Sun Pei Wang Institute of Applied Physical and Computational Mathematics Beijing 100094China Center for Applied Physics and Technology Peking UniversityBeijing 100871China Department of Modern Mechanics University of Science and Technology of ChinaHefei 230027China

Multiple steady solutions and hysteresis phenomenon in the square cavity flows driven by the surface with antisymmetric velocity profile are investigated by numerical simulation and bifurcation analysis.A high order spectral element method with the matrix-free pseudo-arclength technique is used for the steady-state solution and numerical *** complex flow patterns beyond the symmetry-breaking at Re≈320 are presented by a bifurcation diagram for Re<*** results of stable symmetric and asymmetric solutions are consistent with those reported in literature,and a new unstable asymmetric branch is obtained besides the stable branches.A novel hysteresis phenomenon is observed in the range of 2208

关键词： bifurcation and continuation symmetry-breaking hysteresis surface driven cavity flow

Reconstruction and interpretation of photon Doppler velocimetry spectrum for ejecta particles from shock-loaded sample in vacuum

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Chinese Physics B 2021年第6期30卷 419-429页

作者： xiao-feng shi Dong-Jun Ma Song-lin Dang Zong-Qiang Ma Hai-Quan Sun An-Min He Pei Wang Institute of Applied Physical and Computational Mathematics Beijing 100094China Jiangxi University of Applied Science Nanchang 330103China Center for Applied Physics and Technology Peking UniversityBeijing 100871China

The photon Doppler velocimetry(PDV) spectrum is investigated in an attempt to reveal the particle parameters of ejecta from shock-loaded samples in a vacuum. A GPU-accelerated Monte–Carlo algorithm, which considers the multiplescattering effects of light, is applied to reconstruct the light field of the ejecta and simulate the corresponding PDV *** influence of the velocity profile, total area mass, and particle size of the ejecta on the simulated spectra is discussed qualitatively. To facilitate a quantitative discussion, a novel theoretical optical model is proposed in which the singlescattering assumption is applied. With this model, the relationships between the particle parameters of ejecta and the peak information of the PDV spectrum are derived, enabling direct extraction of the particle parameters from the PDV *** values of the ejecta parameters estimated from the experimental spectrum are in good agreement with those measured by a piezoelectric probe.

关键词： ejecta photon Doppler velocimetry Monte–Carlo algorithm light scattering

Suture ligation for submucosal hemostasis during hand-sewn sideto-side duodeno-ileostomy in simultaneous pancreas and kidney transplantation

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World Journal of Gastrointestinal Surgery 2021年第9期13卷 988-999页

作者： Hui Wang Ying-Xin Fu Wen-Li Song Chun-Bai Mo Gang feng Jie Zhao Guang-Hui Pei xiao-feng shi Zhen Wang Yu Cao Ye-Qi Nian Zhong-Yang Shen Department of Kidney and Pancreas Transplant Tianjin First Central HospitalSchool of MedicineNankai UniversityTianjin 300192China

BACKGROUND Enteric anastomotic(EA)bleeding is a potentially life-threatening surgical complication associated with enteric anastomosis during simultaneous pancreas and kidney transplantation(SPKT).AIM To investigate whether suture ligation(SL)for submucosal hemostasis during hand-sewn enteric anastomosis could decrease the morbidity of early EA bleeding in *** We compared the outcomes of 134 patients classified into SL(n=44)and no SL(NSL)groups(n=90).This study adheres to the declarations of Istanbul and Helsinki and all donors were neither paid nor *** During the first postoperative week,the EA bleeding rate in the SL group was lower than that in the NSL group(2.27%vs 15.56%;P=0.021);no relationship was found between EA bleeding and donor age,mean pancreatic cold ischemia time,platelet count,prothrombin time international normalized rate,activated partial thromboplastin time,and thrombin *** leakage was observed in one case in the SL group at postoperative day(POD)14 and in one case at POD 16 in the NSL group(P=0.754).No significant difference was found between the two groups in the patient survival,pancreas graft survival,or kidney graft *** SL for submucosal hemostasis during hand-sewn enteric anastomosis in SPKT can decrease the morbidity of early EA bleeding without increasing the anastomotic leakage rate.

关键词： Anastomosis Gastrointestinal bleeding Hemostasis Ligation Pancreas Transplantation

Local Anesthetic Lidocaine for Gastroscopy Induces Diffuse Alveolar Hemorrhage

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Chinese Medical Journal 2017年第14期130卷 1761-1762页

作者： xiao-feng shi Zhao-Jun Wang Xin-Guang Long Jun-Fei Shen Department of Cardiology Affiliated Hospital of Jiangsu University Zhenjiang Jiangsu 212001 China

To the Editor：A 52-year-old female patient was admitted to the hospital on November 10,2016,due to ＂four hours of cardiopulmonary arrest after fiber endoscopy.＂ Twelve years ago,she was admitted for a radical operation of esophageal cancer and underwent radiotherapy and chemotherapy in our *** had no history of respiratory disease,hemoptysis,or drug *** years ago,the patient underwent a follow-up fiber endoscopy in our *** was applied to the throat for surface anesthesia before the endoscopy ***,along with oxygen inhalation,was administered intravenously for general anesthesia during the *** was performed smoothly,but the patient suddenly became *** spurted out from the airway during tracheal *** was treated with dopamine/metaraminol bitartrate and aminophylline/*** gaining consciousness,the patient was sent to the Intensive Care Unit.

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Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： xiao Xiang feng Gao Yu-Gui Peng Peng Wu Zong-Lin Li Xue-feng Zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states

Coexistence of diffuse large B-cell lymphoma,acute myeloid leukemia,and untreated lymphoplasmacytic lymphoma/waldenström macroglobulinemia in a same patient:A case report

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World Journal of Clinical Cases 2023年第18期11卷 4295-4305页

作者： Liu-Bo Zhang Lu Zhang Hong-Lei Xin Yan Wang Hong-Yu Bao Qing-Qi Meng Su-Yu Jiang Xue Han Wan-Ru Chen Jian-Ning Wang xiao-feng shi Department of Hematology Second Affiliated Hospital of Nanjing Medical UniversityNanjing 210003Jiangsu ProvinceChina Department of Pathology Second Affiliated Hospital of Nanjing Medical UniversityNanjing 210003Jiangsu ProvinceChina

BACKGROUND The Coexistence of myeloid and lymphoid malignancies is *** leukemia occurs more frequently as a secondary event in patients receiving chemotherapy agents for lymphoid *** diagnoses of diffuse large B-cell lymphoma(DLBCL),acute myeloid leukemia(AML),and untreated lymphoplasmacytic lymphoma/Waldenström macroglobulinemia(LPL/WM)in the same patient have not been *** we report one such *** SUMMARY An 89-year-old man had a chest wall mass histopathologically diagnosed as *** bone marrow and peripheral blood contained two groups of *** group of cells fulfilled the criteria of AML,and the other revealed the features of small B lymphocytic proliferative disorder,which we considered LPL/*** chromosomal or genetic changes were detected in bone marrow mononuclear cells,including ATM deletion,CCND1 amplification,mutations of MYD88(L265P)and TP53,WT1 overexpression,and fusion gene of BIRC2-ARAP1,as well as complex chromosomal *** patient refused chemotherapy because of old age and died of pneumonia 1 mo after the final *** The coexistence of DLBCL,AML,and untreated LPL/WM in the same patient is extremely rare,which probably results from multiple steps of genetic *** LPL/WM might have occurred first,then myelodysplastic syndromerelated AML developed,and finally aggressive DLBCL ***,medical staff should pay attention to this rare phenomenon to avoid misdiagnoses.

关键词： Diffuse large B-cell lymphoma Acute myeloid leukemia Small B lymphocyte proliferative disorder Lymphoplasmacytic lymphoma/Waldenström macroglobulinemia Coexistence Case report