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Next-to-leading order QCD corrections to Higgs boson decay to quarkonium plus a photon

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Chinese physics C 2016年第12期40卷 46-51页

作者： Chao Zhou Mao Song Gang Li Ya-Jin Zhou Jian-You Guo school of physics and material science Anhui University Hefei 230601 China school of physics Shandong University Jinan 250100 China

In this paper, we investigate the decay of the Higgs boson to J/ψ（γ ） plus a photon based on NRQCD factorization. For the direct process, we calculate the decay width up to QCD NLO. We find that the decay width for process H → J/ψ（γ ）＋γ direct production at the LO is significantly reduced by the NLO QCD corrections. For the indirect process, we calculate the H→γ＊γ, with virtual 7 substantially decaying to J/ψ（γ）, including all the SM Feynman diagrams. The decay width of indirect production is much larger than the direct decay width. Since it is very clean in experiment, the H →J/ψ（ γ）＋γ decay could be observable at a 14 TeV LHC and it also offers a new way to probe the Yukawa coupling and New physics at the LHC.

关键词： Higgs boson heavy quarkonium NLO QCD

Percolation transport and magnetic transitions in a phase-separated manganite La_(0.55)Ca_(0.45)MnO_3

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science china(Technological sciences) 2011年第9期54卷 2315-2320页

作者： LI Guang WANG LiHua school of physics and materials science Anhui Key Laboratory of Information Materials and Devices Anhui University Hefei 230039 China

The structural, electronic and magnetic properties of La0.55Ca0.45MnO3 were measured. A rapid change of lattice parameters appeared around 190 K associated with the az2 orbital ordering and charge ordering （CO） states that were reflected by both magnetization and resistivity. Great difference of magnetizations between the field-cooling （FC） and zero-field-cooling （ZFC） modes below the charge ordering temperature Too in high magnetic field （H〉4 T） was clearly seen. A field of 5 T （threshold field） is sufficient to completely destroy the antiferromagnetic （AFM） CO state for FC mode in magnetization while it is not the case for ZFC mode. A much larger field （larger than 10 T from ZFC resistivity data） is needed to destroy the CO state for ZFC mode. This could be explained by the coexistence and transformation of two phases reported by Huang et al. For ZFC mode, with increasing H, Tco gradually moves to low temperature regime and the relationship between the critical field Hc （0） to destroy CO state and Tco conforms to a power law Hc = Hc（0）（1 - T/Tco（0））^γ, where Hc （0） is the critical field to destroy the CO state at 0 K, and Too （0） is the CO temperature in zero field.

关键词： manganites phase transition magnetic structure

Exploring Nanoscale Perovskite materials for Next‑Generation Photodetectors:A Comprehensive Review and Future Directions

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Nano-Micro Letters 2025年第2期17卷 46-108页

作者： Xin Li Sikandar Aftab Maria Mukhtar Fahmid Kabir Muhammad Farooq Khan Hosameldin Helmy Hegazy Erdi Akman State Key Laboratory of Pulsed Power Laser Technology National University of Defense TechnologyHefei 230037AnhuiPeople’s Republic of China anhui Laboratory of Advanced Laser Technology Hefei 230037AnhuiPeople’s Republic of China Nanhu Laser Laboratory Changsha 410015HunanPeople’s Republic of China Department of Semiconductor Systems Engineering and Clean Energy Sejong UniversitySeoul 05006Republic of Korea Department of Artificial Intelligence and Robotics Sejong UniversitySeoul 05006Republic of Korea school of Engineering science Simon Fraser UniversityBurnabyBC V5A 1S6Canada Department of Electrical Engineering Sejong UniversitySeoul 05006South Korea Department of physics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Central Labs King Khalid UniversityAlQura’aP.O.Box 96061413 AbhaSaudi Arabia Scientific and Technological Research and Application Center Karamanoglu Mehmetbey University70100 KaramanTurkey

The rapid advancement of nanotechnology has sparked much interest in applying nanoscale perovskite materials for photodetection *** materials are promising candidates for next-generation photodetectors(PDs)due to their unique optoelectronic properties and flexible synthesis *** review explores the approaches used in the development and use of optoelectronic devices made of different nanoscale perovskite architectures,including quantum dots,nanosheets,nanorods,nanowires,and *** a thorough analysis of recent literature,the review also addresses common issues like the mechanisms underlying the degradation of perovskite PDs and offers perspectives on potential solutions to improve stability and scalability that impede widespread *** addition,it highlights that photodetection encompasses the detection of light fields in dimensions other than light intensity and suggests potential avenues for future research to overcome these obstacles and fully realize the potential of nanoscale perovskite materials in state-of-the-art photodetection *** review provides a comprehensive overview of nanoscale perovskite PDs and guides future research efforts towards improved performance and wider applicability,making it a valuable resource for researchers.

关键词： Nanoscale perovskites Photodetectors Nanosheets Nanorods Nanowires Quantum dots Nanocrystals

Tensor coupling effect on relativistic symmetries

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science china(physics,Mechanics & Astronomy) 2016年第8期59卷 34-42页

作者： ShouWan Chen DongPeng Li JianYou Guo school of physics and material science Anhui University school of Electronic and Information Engineering Hefei Normal University

The similarity renormalization group is used to transform the Dirac Hamiltonian with tensor coupling into a diagonal form. The upper(lower) diagonal element becomes a Schr¨odinger-like operator with the tensor component separated from the original *** on the operator, the tensor effect of the relativistic symmetries is explored with a focus on the single-particle energy contributed by the tensor coupling. The results show that the tensor coupling destroying(improving) the spin(pseudospin) symmetry is mainly attributed to the coupling of the spin-orbit and the tensor term, which plays an opposite role in the single-particle energy for the(pseudo-) spin-aligned and spin-unaligned states and has an important influence on the shell structure and its evolution.

关键词： similarity renormalization group tensor relativistic symmetries

Microstructure and optical absorption of Au-MgF2 nanoparticle cermet films

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Chinese physics B 2006年第4期15卷 859-865页

作者：孙兆奇蔡琪宋学萍 school of physics and material science Anhui University Hefei 230039 China

The microstructure and optical absorption of Au-MgF2 nanoparticle cermet films with different Au contents are studied. The microstructural analysis shows that the films are mainly composed of the amorphous MgF2 matrix with embedded fcc Au nanoparticles with a mean size of 9.8-21.4nm. Spectral analysis suggests that the surface plasma resonance （SPR） absorption peak of Au particles appears at λ=492-537nm. With increasing Au content, absorption peak intensity increases, profile narrows and location redshifts. Theoretical absorption spectra are calculated based on Maxwell-Garnett theory and compared with experimental spectra.

关键词： nanoparticle cermet films microstructure optical absorption

Scheme for Entanglement Generation of Two Atoms in Two Bad Cavities

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Communications in Theoretical physics 2008年第3期49卷 595-598页

作者： ZHANG Li-Hua CAO Zhuo-Liang Department of physics Anqing Teachers College Anqing 246011 China anhui Key Laboratory of Information material and Devices School of Physics and Materials Science Anhui University Hefei 230039 China

We present a scheme for generation of two-atomic entangled state by using the interference of polarized photons. The scheme does not require complete mapping between the atomic state and the photonic state, nor does it require the establishment of maximal entanglement between the atom and the cavity. And the atom-cavity coupling strength is smaller than the cavity decay rate. This greatly relaxes the requirement on the cavity quality. The scheme is for non-post-selection results and all the steps of the scheme are within the current technologies.

关键词： entangled state cavity QED

Scheme to Implement Optimal Symmetric 1→2 Universal Quantum Telecloning Through Cavity-Assisted Interaction

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Communications in Theoretical physics 2008年第11期50卷 1096-1100页

作者： YANG Zhen ZHANG Wen-Hai HE Juan YE Liu school of physics ＆： material science Anhui University Hefei 230039 China Department of physics ＆ Electronic Engineering Hefei Teachers College Hefei 230601 China Department of physics Fuyang Normal College Fuyang 236041 China

We propose a scheme to implement the optimal symmetric 1 → 2 universal quantum telecloning through cavity-assisted interaction. In our scheme an arbitrary single atomic state can be telecloned to two single atomic states. And three atoms are trapped in three spatially separated cavities respectively. With a particular multiparticle entangled state acting as a quantum information channel and the trapped single atom acting as a quantum network node for its long-lived internal state, quantum information can be telecloned among nodes and can stored in the nodes.

关键词： telecloning cavity-QED cavity-assisted interaction

Transformation Operator and Criterion for Perfectly Teleporting Arbitrary Three-Qubit State with Six-Qubit Channel and Bell-State Measurement

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Chinese physics Letters 2009年第12期26卷 20-23页

作者：张子云刘益民左学勤章文张战军 Key Laboratory of Optoelectronic Information Acquisition and Manipulation of Ministry of Education of china School of Physics and Material Science Anhui University Hefei 230039 Department of physics Shaoguan University Shaoguan 512005

Using the method presented recently [***.A 77（2008）014306; ***.A 369（2007）377], the transformation operator （TO） is explicitly given for teleporting an arbitrary three-qubit state with a six-qubit channel and Bell-state measurements. A criterion on whether such quantum teleportation can be perfectly realized is educed in terms of TO. Moreover, six instantiations on TO and criterion are concisely shown.

关键词： Computational physics Quantum information and quantum mechanics

Sudden Death of Entanglement between Two Atoms with Initial Tripartite Entangled State in the Tavis-Cummings Model

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Chinese physics Letters 2008年第3期25卷 825-827页

作者：杨青杨名曹卓良 Key Laboratory of Opto-electronic Information Acquisition and Manipulation (Ministry of Education) School of Physics and Material Science Anhui University Hefei 230039 Department of physics Hefei Teachers College Hefei 230061

We study the entanglement dynamics of two atoms with initial tripartite entangled W-like state in the Tavis-Cummings model. We find that the entanglement evolvement is sensitive not only to the entanglement degree of the initial state but also to the concrete form of the initial state. The so-called sudden death effect occurs only for some initial states.

关键词： entanglement Tavis-Cummings model initial state