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Plastic deformation of a Zr-based bulk metallic glass fabricated by selective laser melting

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Journal of Materials Science & Technology 2021年第1期60卷 139-146页

作者： l.deng K.Kosiba R.limbach l.Wondraczek U.Kühn S.Pauly IFW Dresden Institute for Complex MaterialsHelmholtzstraße 20D-01069DresdenGermany Otto Schott Institute of Materials Research University of JenaFraunhoferstraße 6D-07743JenaGermany University of Applied Sciences Aschaffenburg Würzburger Straße 45D-63743AschaffenburgGermany

Fully amorphous Zr_(52.5)Cu_(17.9)Ni_(14.6)Al_(10)Ti_(5) bulk metallic glass(BMG) samples with a relative density exceeding 98% were fabricated via selective laser melting(SlM).High fracture stresses of around1700 MPa and a reproducible plastic strain of about 0.5% were obtained for cylindrical SlM *** analysis of the observed serrations during compressive loading implies that the shear-band dynamics in the additively manufactured samples distinctly differ from those of the as-cast *** phenomenon appears to originate from the presence of uniformly dispersed spherical pores as well as from the more pronounced heterogeneity of the glass itself as revealed by instrumented *** these heterogeneities,the shear bands are straight and form in the plane of maximum shear *** manufacturing,hence,might not only allow for producing large BMG samples with complex geometries but also for manipulating their deformation behaviour through tailoring porosity and structural heterogeneity.

关键词： Powder bed fusion Selective laser melting Bulk metallic glass Serrated flow Heterogeneity

Hybrid level anharmonicity and interference-induced photon blockade in a two-qubit cavity QED system with dipole–dipole interaction

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Photonics Research 2021年第7期9卷 1264-1271页

作者： C.J.ZHU K.HOU Y.P.YANG l.deng MOE Key laboratory of Advanced Micro-Structured Materials School of Physics Science and EngineeringTongji UniversityShanghai 200092China School of Physical Science and Technology Soochow UniversitySuzhou 215006China Collaborative Innovation Center of light Manipulations and Applications Shandong Normal UniversityJinan 250358China Department of Mathematics and Physics Anhui Jianzhu UniversityHefei 230601China Center for Optics Research and Engineering(CORE) Shandong UniversityQingdao 266237China

We theoretically study a quantum destructive interference (QDI)-induced photon blockade in a two-qubit driven cavity quantum electrodynamics system with dipole–dipole interaction (DDI). In the absence of dipole–dipole interaction,we show that a QDI-induced photon blockade can be achieved only when the qubit resonance frequency is different from the cavity mode frequency. When DDI is introduced the condition for this photon blockade is strongly dependent upon the pump field frequency,and yet is insensitive to the qubit–cavity coupling strength. Using this tunability feature we show that the conventional energy-level-anharmonicity-induced photon blockade and this DDI-based QDI-induced photon blockade can be combined together,resulting in a hybrid system with substantially improved mean photon number and second-order correlation function. Our proposal provides a nonconventional and experimentally feasible platform for generating single photons.

关键词： function. dipole photon

Scientific discovery of a unique cloud-shaped rock pillar in an ancient quarry in Zhejiang Province

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Scientific discovery of a unique cloud-shaped rock pillar in...

中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： l.deng l.H.li Z.F.Yang Key laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of Sciences

In this paper,one unique cloud-shaped nock pillar is discovered in an ancient quarry in Zhejiang Province,Textual research indicates that this ancient quarry was initially exploited la liang Dynasty(502-557 BC}.Geological conditions of the ancient quarry arc elaborated in this *** investigation results indicate that this rock pillar was left during *** reconstruction through the data acquired by 3D laser scanning presents that ii has a complex ***-Dimensional finite difference stimulation using Mohr-Coulomb parameters acquired from back analysis has been conducted to analyze its stress distribution and *** results suggest a maximum stress of1,7 MPa in this pillar,the stress reduces from bottom to top,and from one side to the opposite side of the pillar,and finally the stress exhibits a similar *** displacement in B side reduces from bottom to top,then increases reversely.

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Multi-function and low-noise phase-shifting manipulator at single-photon level

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Multi-function and low-noise phase-shifting manipulator at s...

第十七届全国量子光学学术会议

作者：朱成杰 Y.li l.deng E.W.HAGlEY W.R.GARRETT 同济大学 Department of Physics East China Normal University National Institute of Standards and Technology Department of Physical and Astronomy University of Tennessee

＜正＞利用相干制备的三能级原子气体,我们提出实现单光子无损相位操控的理论模型。基于两波混频效应,我们发现通过锁定泵浦光与双光子失谐,探测光的吸收可以被完全抵消,同时其相位不随探测光的频率而发生改变。通过选择合适的系统参数...

＜正＞利用相干制备的三能级原子气体,我们提出实现单光子无损相位操控的理论模型。基于两波混频效应,我们发现通过锁定泵浦光与双光子失谐,探测光的吸收可以被完全抵消,同时其相位不随探测光的频率而发生改变。通过选择合适的系统参数,我们可以在很大的频率范围内使探测光的相位为π,而探测光的吸收接近于零,从而实现单光子、低噪声量子相位

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X-RAY STRUCTURE DETERMINATION OF SUBTIlISIN E AT 2 RESOlUTION

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X-RAY STRUCTURE DETERMINATION OF SUBTILISIN E AT 2 RESOLUT...

Sixteenth Congress of the International Union of Crystallography

作者： N.-M.Chu K.Shi l.Zhou R.-C.Bi l.deng B.li Institute of Biophysics Academia Sinica

Subtilisin E from B,subtilis was produced by genetic engineering in Department of Biology,University of Science and Technology,Hefei,China,It has been crystallized in space group P222 with cell dimensions a=74.35A,,b=80.98A, and c=88.5 *** crystals contain two molecules of subtilisin E in an asymmetric unit,and this is a rare case among the subtilisin crystal structures studied so ***

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立体多卷系列专著现代国际比较市场营销学加拿大、中国、美国、日本理论与实践

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A Well-Collimated Quasi-Continuous Atom laser

丛书名：立体多卷系列

1992年

作者：李春林（加）邓胜梁（Sheng l.deng）

来源：汇雅图书（南通市图书馆... 评论

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A Well-Collimated Quasi-Continuous Atom Laser

CCAST“激光冷却：玻色—爱因斯坦凝聚和原子激射器”研讨会

作者： E.W.Hagley l.deng M.Kozuma J.Wen K.Helmerson S.l.Rolston W.D.Phillips National Institute of Standards and Technology Gaithersburg.MD 20899.USA. National Institute of Standards and Technology Gaithersburg.MD 20899.USA.Georgia Southern University.Statesboro.CA 30460.USA. Institute of Physics.University of Tokyo Tckyo 153-8902.Japan

Extraction of sodium atoms from a trapped Bose-Einstein condensate (BEC) bya coherent. stimulated Raman process is demonstrated. Optical Raman pulsesdrive transitions between trapped and untrapped magnetic sublevels. giving theoutput-coupled BEC fraction a well-defined momentum. The pulsed outputcoupling can be run at such a rate that the extracted atomic wave packetsstrongly overlap, forming a highly directional. quasi-continuous matter wave.

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Supplementary Materials:Observation of topological links associated with Hopf insulators in a solid-state quantum simulator

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Chinese Physics letters 2017年第6期 26-36页

作者： X.-X.Yuan l.He S.-T.Wang D.-l.deng F.Wang W.-Q.lian X.Wang C.-H.Zhang H-l.Zhang X.-Y.Chang l.-M.Duan Center for Quantum Information Institute for Interdisciplinary Information SciencesTsinghua University Department of Physics University of Michigan Condensed Matter Theory Center and Joint Quantum Institute Department of PhysicsUniversity of Maryland

MATERIAlS AND METHODS Experimental setup We illuminate the diamond Nitrogen-Vacancy(NV)center and collect its fluorescence with a home-built confocal microscope with a 1.49 NA objective(Olympus 60X,under oil immersion... 详细信息

关键词： Supplementary Materials:Observation of topological links associated with Hopf insulators in a solid-state quantum simulator

Coherent Splitting of Bose-Einstein Condensed Atoms with Optically Induced Bragg Diffraction

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Coherent Splitting of Bose-Einstein Condensed Atoms with Opt...

CCAST“激光冷却：玻色—爱因斯坦凝聚和原子激射器”研讨会

作者： M.Kozuma l.deng E.W.Hagley J.Wen R.lutwak K.Helmerson S.l.Rolston W.D.Phillips Current address:Department of Physics Tokyo University Tokyo 153-8920Japan. Permanent address:Department of Physics Georgia Southern University StatesboroGA 30460. National Institute of Standards and Technology Gaithersburg Maryland 20899 Current address:FTS Inc. BeverlyMA 01915

We have observed Bragg diffraction ofa Bose-Einstein condensate of sodium atoms by a moving,periodic,optical *** coherent process of Bragg diffraction prcduced a spitting of thecondensate with unidirectional momentum *** the momentum selectivity of the Braggprocess,we separated a condensate component with a momentrm Width narrower than that of theoriginal *** repeatedly pulsing the optical potential while the atoms were *** observed the trajectory of the split atomic wave packets in the confining magnetic potential.[S0031-9007(98)08316-1]

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