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Hysteresis loss free soft magnetic ferrites based on Larmor precession

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Chinese physics B 2023年第8期32卷 433-438页

作者：冯双久赵幸丽朱守金吕庆荣阚绪材刘先松 Engineering Technology Research Center of Magnetic materials of anhui Province School of Materials Science and EngineeringAnhui UniversityHefei 230601China school of physics and Optoelectronic Engineering Anhui UniversityHefei 230601China

A big enough transverse magnetic field applied to soft magnetic ferrite toroid can magnetize the ferrite to a saturation level in transverse direction and almost completely suppresses magnetic domain structures in the ferrite,the response to the longitudinal alternating electromagnetic field changes from the original domain wall displacements and spin rotations to the precession of magnetization around the transverse field,and the hysteresis loss disappears in the *** theoretical and experimental results indicate that the permeability and magnetic loss in the ferrite can be controlled by adjusting the transverse magnetic field.A higher Q value with relatively low permeability can be achieved by increasing the transverse field,which ensures that the ferrite can be operated at high frequencies,with magnetic loss being very low.

关键词： ferrites Larmor precession magnetic losses hysteresis loss free

Generation of Arbitrary Pure States for Three-dimensional Motion of a Trapped Ion

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Communications in Theoretical physics 2010年第4期53卷 755-758页

作者：拿大创王先萍董萍杨名曹卓良 Department of physics and Electronic Engineering Hefei Normal University school of physics & Electronic science Fuyang Normal College school of physics & material science Anhui University

In this paper, we propose a scheme for generating an arbitrary three-dimensional pure state of vibrational motion of a trapped ion. Our scheme is based on a sequence of laser pulses, which are tuned to the appropriate... 详细信息

关键词： trapped-ion vibrational sidebands three-dimensional pure state of vibrational motion

Influence of different fields of mesons on the pseudospin symmetry in single-neutron resonant states

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Chinese physics C 2021年第12期45卷 106-113页

作者： Hua-Ming Dai Min Shi Shou-Wan Chen Quan Liu school of physics and Optoelectronic Engineering Anhui UniversityHefei 230601China school of Mathematics and physics Anhui Jianzhu UniversityHefei 230601China

In the framework of the relativistic mean field theory combined with the complex momentum representation method,we elucidate the pseudospin symmetry in the single-neutron resonant states and its dependence on the σ,ω,and ρ meson *** with the effect of theρfield,the τandωfields provide the main contributions to the pseudospin energy and width splitting of the resonant pseudospin ***,we compare quantitatively the pseudospin wave functions's plittings in resonant doublets,and investigate their dependencies on different fields of mesons,which is consistent with that of energy and width *** research is helpful to understand the mechanism and properties of pseudospin symmetry for resonant states.

关键词： pseudospin symmetry single-neutron resonant state splitting

Skin mimicking-sweating evaporation polyimide cooling film for electronic devices

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science china(Technological sciences) 2023年第10期66卷 2797-2807页

作者： JIANG Miao XIAO Chao HE XuSheng DU HuiChao WANG YanYan DING Xin ZHANG Xian LI XiaoFei ZHENG Kang LIU XiangLan CHEN Lin TIAN XingYou Key Lab of Photovoltaic and Energy Conservation materials Institute of Solid State PhysicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China science Island Branch University of Science and Technology of ChinaHefei 230026China Lu’an Branch Anhui Institute of Innovation for Industrial TechnologyLu’an 237000China school of materials science and Engineering Anhui UniversityHefei 230039China

In hot environments,the human body shows an efficient capability to maintain a stable temperature by benefiting from sweating *** by this skin perspiration strategy,in this study,we demonstrated an innovative polyimide foam(PIF)-based mimetic skin with excellent cooling capability by integrating a silver coating and reusable hydrogel for the first *** of the hybrid thermal dissipating system,the successive silver coating quickly transferred heat to the inside of the polyacrylamide ***,the hydrogel absorbed a large amount of heat due to its large enthalpy and effectively dissipated heat to the environment through the evaporation of moisture,similar to the sweating of ***,the temperature of the skin-like film was reduced by 25.4℃compared with pure PIF under a high-power laser heating *** and remarkable cooling effects were also obtained in mobile phone and battery applications,far better than commercially available thermally conductive polyimide(PI).This outstanding performance paves a new way for the thermal management application of PI in wearable electronics,microprocessors,and flexible electronics.

关键词： skin-mimicking polyimide hydrogel thermal management sweat cooling

Synthesis and characterization of poly(methyl methacrylate-co-polyhedral oligomeric silsesquioxane)hybrid nanocomposites

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Chinese Chemical Letters 2007年第8期18卷 960-962页

作者： Ben Hong Yang Hong Yao Xu Cun Li Shan Yi Guang school of Chemistry and Chemical Engineering Anhui University Hefei 230039 China College of material science and Engineering ＆ State Key Laboratory of Chemical Fibers and Polymeric materials Donghua University Shanghai 200051 China Department of Chemical and material Engineering Hefei University Hefei 230022 China

A novel poly（methyl methacrylate-co-polyhedral oligomeric silsesquioxane） hybrid nanocomposite was synthesized by free radical polymerization and characterized by 1H NMR, 29Si NMR, and TGA technologies. Compared wit... 详细信息

关键词： Poly(methyl methacrylate) Polyhedral silsesquioxane Nanoeomposite

A nearly deterministic scheme for generation of multiphoton GHZ states with weak cross-Kerr nonlinearity

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Chinese physics B 2011年第10期20卷 91-95页

作者：王奕叶柳方保龙 school of physics and material science Anhui University Teaching and Research Section of physics School of Life Sciences Anhui Medical University

We propose a scheme to generate polarization-entangled multiphoton Greenberger-Horne^Zeilinger （GHZ） states based on weak cross-Kerr nonlinearity and subsequent homodyne measurement. It can also be generalized to pr... 详细信息

关键词： GHZ state cross-Kerr nonlinearity quantum entanglement

Optimal Phase-Covariant Cloning in 3 Dimensions

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Communications in Theoretical physics 2012年第6期57卷 991-994页

作者：张文海余龙宝曹卓良叶柳 Department of physics Huainan Normal University school of Electronic and Information Engineering Hefei Normal University school of physics and material science Anhui University

In this paper,we present the explicit transformations of the optimal 1 → 3,4,5 phase-covariant cloning in 3 *** cloning fidelities are covered by the theoretical bounds of the optimal 1 → 3k,3k + 1,3k + 2 phase-cova... 详细信息

关键词： quantum cloning phase-covariant cloning

Revisiting Controlled Quantum Secure Direct Communication Using a Non-symmetric Quantum Channel with Quantum Superdense Coding

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Communications in Theoretical physics 2008年第4期49卷 887-890页

作者： LIU Jun LIU Yi-Min XIA Yan ZHANG Zhan-Jun Key Laboratory of Optoelectronic Information Acquisition ＆ Manipulation of Ministry of Education of china School of Physics ＆ Material Science Anhui University Hefei 230039 China Department of physics Shaoguan University Shaoguan 512005 China school of Physic and Optoelectronic Dalian University of Technology Dalian 116024 China

Recently Xia and Song [Phys. Lett. A 364 （2007） 117] have proposed a controlled quantum secure direct communication （CQSDC） protocol. They claimed that in their protocol only with the help of the controller Charlie, the receiver Alice can successfully extract the secret message from the sender Bob. In this letter, first we will show that within their protocol the controller Charlie＇s role could have been excluded if it were not for their unreasonable design. We then revise the Xia-Song CQSDC protocol such that its original advantages are reta/ned and the CQSDC can be really realized.

关键词： quantum secure direct communication quantum superdense coding non-symmetric quantumchannel

Scheme for concentration of the unknown GHZ entangled states

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Chinese physics B 2006年第5期15卷 923-926页

作者：张刚杨名薛正远曹卓良 school of physics & material science Anhui University Hefei 230039 China Department of Mathematics & physics West Anhui University Lu'an 237012 China

We propose two schemes for concentrating unknown nonmaximally tripartite GHZ entangled states via cavity quantum electrodynamics （QED） techniques. The finial pure states obtained from the two schemes are shared by two or three parties. Our schemes only require large-detuned interaction between two driven atoms and the quantized cavity mode, which is insensitive to both the cavity decay and thermal field, thus the schemes are well within current experimental technology.

关键词： unknown GHZ entangled states concentration cavity QED