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The holographic fermions dual to massive gravity

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Science China(Physics,Mechanics & Astronomy) 2016年第10期59卷 49-57页

作者： Li-Qing Fang[[ xiao-Mei kuang Jian-Pin Wu School of Physics and Electronic Information Shangrao Normal UniversityShangrao 334000China Department of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Key Laboratory of High Temperature Superconductors Shanghai 200444China Instituto de Fisica Pontificia Universidad Catolica de ValparaisoCasilla 4059ValparaisoChile Institute of Gravitation and Cosmology Department of PhysicsSchool of Mathematics and PhysicsBohai UniversityJinzhou 121013China

We investigate the properties of the spectral function of the fermionic operator in the field theory which is dual to a 4-dimensional massive gravity. We first study the Fermi surface and the dispersion relation in the dual boundary theory. We find that as the massive parameters is decreased, the Fermi momentum becomes lower and the low energy excitation near Fermi surface behaves more like non-Fermi liquid. Then, we introduce a dipole coupling in the bulk theory and explore the emergence of a gap in the fermionic spectral function. It is found that larger critical dipole coupling is needed to open the gap than that in Einstein gravity. Accordingly,in the field theory dual to massive gravity, it requires stronger negative dipole coupling to generate the marginal Fermi liquid.

关键词： holography duality AdS/CFT correspondence holographic fermions

Hyperthyroidism-associated coronary spasm:A case of non-ST segment elevation myocardial infarction with thyrotoxicosis

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Journal of Geriatric Cardiology 2011年第4期8卷 258-259页

作者： xiao-Hu kuang Shu-Yang Zhang Chinese Academy of Medical Sciences&Peking Union Medical College&Peking Union Medical College Hospital Beijing 100730China Department of Cardiology Peking Union Medical College HospitalShuai Fu Yuan 1Beijing 100730China

Hyperthyroidism is associated with many heart *** state has a relationship with coronary *** present a case of a non-menopausal woman with hyperthyroidism who complained of chest *** diagnosis of coronary spasm was confirmed by coronary angiography(CAG).She is treated well with anti-thyrotoxicosis and anti-anginal *** recommend not use CAG as the first diagnostic choice among the patients with medication-uncontrolled hyperthyroidism and chest pain.

关键词： hyperthyroidism coronary spasm coronary angiography beta-blocker

Analysis of Ground-State Zero-Field Splitting for Mn^(2+) in ZnNbOF_(5)·6(H_(2)O) and CoNbOF_(5)·6(H_(2)O)

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Chinese Physics Letters 2011年第6期28卷 245-247页

作者： LI Ju-Fen kuang xiao-Yu School of Science Southwest Petroleum UniversityChengdu 610065 Institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610065 International Centre for Materials Physics Chinese Academy of SciencesShenyang 110016

The electron paramagnetic resonance spectra of trigonal Mn^(2+)centers in ZnNbOF_(5)·6(H_(2)O)and CoNbOF_(5)·6(H_(2)O)crystals are studied on the basis of the complete energy matrices for a d5 configuration ion in a trigonal ligand *** is demonstrated that the local lattice structure around a trigonal Mn2+center has an elongation distortion along the crystalline c3 axis,and when Mn2+is doped in the ZnNbOF_(5)·6(H_(2)O)and CoNbOF_(5)·6(H_(2)O)crystals,there is a similar local *** the EPR calculation,the local lattice structure parameters for trigonal Mn2+centers in ZnNbOF_(5)·6(H_(2)O)and CoNbOF_(5)·6(H_(2)O)are determined.

关键词： field trigonal centers

Scalar field in massive BTZ black hole and entanglement entropy

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Chinese Physics C 2020年第1期44卷 129-135页

作者： Yu-Ting Zhou xiao-Mei kuang College of Mathematics and Science Yangzhou UniversityYangzhou 225009China Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China

In this paper,we investigate the quantum scalar fields in a massive BTZ black hole *** study the entropy of the system by evaluating the entanglement entropy using a discretized ***,we fit the results with a log-modified formula of the black hole entropy,which is introduced by quantum *** coefficients of leading and sub-leading terms affected by the mass of graviton are numerically analyzed.

关键词： massive BTZ black hole entanglement entropy scalar field

Entanglement Evolution of Two-Coupled Spins in a Time-Dependent Rotating Magnetic Field

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Communications in Theoretical Physics 2008年第10期50卷 883-888页

作者： ZHANG Shi-Xun ZHU Qin-Sheng kuang xiao-Yu Institute of Atomic and Molecular Physics Sichuan University Chengdu 610065 China International Center for Materials Physics Chinese Academy of Sciences Shenyang 110016 China

We study the dynamics evolution of a two-qubit Heisenberg XXX spin chain under a time-dependent rotating magnetic field. Based on the algebraic structure of the non-autonomous system, the exact solution of the Schrodinger equation is obtained by using the method of algebraic dynamics. Based on the time-dependent analytical solution, we further study the entanglement evolution between the two coupled spins for different initial states, and find that the entanglement is determined by the coefficients of the initial state and the coupling constant J of the system.

关键词： entanglement evolution algebraic dynamics non-autonomous system

Time evolutions of scalar field perturbation in Schwarzschild de-Sitter black hole from Einstein-scalar–Gauss–Bonnet theory

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Communications in Theoretical Physics 2024年第1期76卷 76-81页

作者： Cheng Xu Zhen-Hao Yang xiao-Mei kuang Rui-Hong Yue Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou225009China

The scalar-free black hole could be unstable against the scalar field perturbation when it is coupled to a Gauss–Bonnet(GB)invariant in a special *** is known that the tachyonic instability in this scenario is triggered by the sufficiently strong GB *** this paper,we focus on the time domain analysis of massive scalar field perturbation around the Schwarzschild de-Sitter black hole in Einstein-scalar–Gauss–Bonnet *** analyzing the scalar field propagation,we find that the scalar field will finally grow when the GB coupling is large *** could lead to the instability of the background black ***,we demonstrate how the mass of the scalar field and the GB coupling strength affect the onset of tachyonic instability.

关键词： black hole perturbation scalar-Einstein-Gauss-Bonnet gravity time domain evolution me

Nanopreparations for mitochondria targeting drug delivery system: Current strategies and future prospective

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Asian Journal of Pharmaceutical Sciences 2017年第6期12卷 498-508页

作者： Zhenjie Wang Weiling Guo xiao kuang Shanshan Hou Hongzhuo Liu School of Pharmacy Shenyang Pharmaceutical University

Mitochondria are a novel and promising therapeutic target for diagnosis, treatment and prevention of a lot of human diseases such as cancer, metabolic diseases and neurodegenerative disease. Owing to the mitochondrial special bilayer structure and highly negative potential nature, therapeutic molecules have multiple difficulties in reaching mitochondria. To overcome multiple barriers for targeting mitochondria, the researchers developed various pharmaceutical preparations such as liposomes, polymeric nanoparticles and inorganic nanoparticles modified by mitochondriotropic moieties like dequalinium (DQA),triphenylphosphonium (TPP), mitochondrial penetrating peptides (MPPs) and mitochondrial protein import machinery that allow specific *** targeted formulations exhibited enhanced pharmacological effect and better therapeutic effect than their untargeted counterpart both in vitro and in vivo. Nanocarriers may be used for bio-therapeutic delivery into specific mitochondria that possess a great potential treatment of mitochondria related diseases.

关键词： Mitochondria-targeting Liposomes DQAsomes Nanoparticles Cancer Diabetes

Nonexistence of quantum black and white hole horizons in an improved dynamic approach

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Science China(Physics,Mechanics & Astronomy) 2024年第8期67卷 56-73页

作者： Wen-Cong Gan xiao-Mei kuang Zhen-Hao Yang Yungui Gong Anzhong Wang Bin Wang College of Physics and Communication Electronics Jiangxi Normal UniversityNanchang 330022China GCAP-CASPER Physics DepartmentBaylor UniversityWaco 76798-7316USA Institute for Theoretical Physics&Cosmology Zhejiang University of TechnologyHangzhou 310023China United Center for Gravitational Wave Physics(UCGWP) Zhejiang University of TechnologyHangzhou 310023China Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China Department of Physics School of Physical Science and TechnologyNingbo UniversityNingbo 315211China School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai 200240China

In this paper,we study the quantum geometric effects near the locations where classical black hole horizons used to appear in Einstein's classical theory,within the framework of an improved dynamic approach,in which the internal region of a black hole is modeled by the Kantowski-Sachs(KS)spacetime and the two polymerization parameters are functions of the phase space *** detailed analysis shows that the effects are so strong that black and white hole horizons of the effective quantum theory do not exist at all and instead are replaced by transition surfaces,across which the metric coefficients and their inverses are smooth and remain finite,as are the corresponding curvatures,including the Kretschmann *** surfaces always separate trapped regions from anti-trapped *** number of such surfaces is infinite,so the corresponding KS spacetimes become geodesically complete,and no black and white hole-like structures exist in this scheme.

关键词： canonical quantization loop quantum gravity quantum aspects of black holes

Exploration of the structural and optical properties of a red-emitting phosphor K_2TiF_6:Mn^(4+)

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Chinese Physics B 2019年第1期28卷 544-549页

作者： Xi-Long Dou xiao-Yu kuang Xin-Xin Xia Meng Ju Institute of Atomic and Molecular Physics Sichuan University School of Physical Science and Technology Southwest University

The exploration of the appropriate red phosphor with good luminescence properties is an important issue in the development of current white light-emitting diode(WLED) devices. Transition metal Mn-doped compounds are fascinating luminescent materials. Herein, we performed a systematic theoretical study of the microstructure and optical properties of K_2TiF_6:Mn^(4+) using the CALYPSO structure search method in combination with first-principles calculations. We uncovered a novel structure of K_2TiF_6:Mn^(4+) with space group P-3m1 symmetry, where the impurity Mn_(4+) ions are accurately located at the center of the MnF_6 octahedra. Based on our developed complete energy matrix diagonalization(CEMD)method, we calculated transition lines for ~2E_g →~4A_2,~4A_2→~4T_2, and^4A_2→T2at 642 nm, 471 nm, and 352 nm,respectively, which are in good agreement with the available experimental data. More remarkably, we also found another transition(~4A_2→~2T_2) that lies at 380 nm, which should be a promising candidate for laser action.

关键词： crystal structures first-principles calculations K2TiF6