检索结果-南通市图书馆

Topologically protected entanglement switching around exceptional points

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第8期13卷 1631-1644页

作者： Zan Tang Tian Chen Xing Tang Xiangdong Zhang Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of Technology100081 BeijingChina

The robust operation of quantum entanglement states is crucial for applications in quantum information,computing,and communications^(1–3).However,it has always been a great challenge to complete such a task because of decoherence and ***,we propose theoretically and demonstrate experimentally an effective scheme to realize robust operation of quantum entanglement states by designing quadruple degeneracy exceptional *** encircling the exceptional points on two overlapping Riemann energy surfaces,we have realized a chiral switch for entangled states with high *** to the topological protection conferred by the Riemann surface structure,this switching of chirality exhibits strong robustness against perturbations in the encircling ***,we have experimentally validated such a scheme on a quantum walk *** work opens up a new way for the application of non-Hermitian physics in the field of quantum information.

关键词： exceptional quantum Riemann

Designing single atom catalysts for exceptional electrochemical CO_(2) reduction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2024年第1期43卷 3-5页

作者： Muhammad Humayun Mohamed Bououdina Abbas Khan Sajjad Ali Chundong Wang Energy Water and Environment LabCollege of Humanities and SciencesPrince Sultan UniversityRiyadh11586Saudi Arabia School of Integrated Circuits Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan430074PR China Department of Chemistry Abdul Wali Khan University MardanMardan23200Pakistan

The release of anthropogenic CO_(2)emissions into the atmosphere has significantly accelerated global warming within the past few *** to the latest data,it is predicted that the concentration of CO_(2)will rise to 800 ppm over this century,and could reach 2000 ppm by *** high level of CO_(2)is expected to result in significant increase in global temperature as well as ocean acidification[1].

关键词： exceptional global release

Surprised by exceptional stability of confined single-atom cluster catalysts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Materials 2024年第5期67卷 1676-1677页

作者： Aiqin Wang Tao Zhang Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian116023China

Single-atom catalysts(SACs)have recently grown as one of the most active frontiers in heterogeneous catalysis[1,2].Intensive research efforts have been invested towards exploring various SACs for thermocatalysis,electrocatalysis as well as photocatalysis,and in most cases,SACs exhibit superior activities and distinctive selectivities compared with the nanoparticle counterparts,thanks to the maximized atom utilization and isolated mononuclear active site *** spite of these merits.

关键词： structure catalysis exceptional

exceptional dynamics at exceptional points

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第1期13卷 4-5页

作者： Wenjie Wan State Key Laboratory of Advanced Optical Communication Systems and Networks University of Michigan-Shanghai Jiao Tong University Joint InstituteShanghai Jiao Tong UniversityShanghai200240China Department of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai200240China

exceptional points(EPs),singularities of non-Hermitian systems,often exhibit exotic behaviors by engineering the balance between the system gain and ***,EPs have been demonstrated to enable unidirectional perfect abso... 详细信息

关键词： spectrum. exceptional points

Independent control of circularly polarized light with exceptional topological phase coding metasurfaces

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2024年第6期12卷 534-542页

作者： YICHENG LI SHICHENG WAN SHAOXUAN DENG ZHENGWEI DENG BO LV CHUNYING GUAN JUN YANG ANDREY BOGDANOV PAVEL BELOV JINHUI SHI Key Laboratory of Photonic Materials and Devices Physics for Oceanic Applications Ministry of Industry and Information TechnologyCollege of Physics and Optoelectronic EngineeringHarbin Engineering UniversityHarbin 150001China Key Laboratory of In-Fiber Integrated Optics of Ministry of Education College of Physics and Optoelectronic EngineeringHarbin Engineering UniversityHarbin 150001China School of Physics and Engineering ITMO UniversitySt.Petersburg 197101Russia School of Information Engineering Guangdong University of TechnologyGuangzhou 510008China Qingdao Innovation and Development Center Harbin Engineering UniversityQingdao 266000China

exceptional points,as degenerate points of non-Hermitian parity-time symmetric systems,have many unique physical *** to its flexible control of electromagnetic waves,a metasurface is frequently used in the field of *** this work,we developed a parity-time symmetric metasurface and implemented the 2πtopological phase surrounding an exceptional *** with Pancharatnam-Berry phase,the topological phase around an exceptional point can achieve independent regulation of several circular polarization *** combined the Pancharatnam-Berry phase with the exceptional topological phase and proposed a composite coding metasurface to achieve reflection decoupling of different circular *** work provides a design idea for polarimetric coding metasurfaces in the future.

关键词： properties. exceptional topological

Localization Dynamics at the exceptional Point of Non-Hermitian Creutz Ladder

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2024年第2期41卷 83-93页

作者：张舒迈何天毅金亮 School of Physics Nankai UniversityTianjin 300071China

We propose a quasi-one-dimensional non-Hermitian Creutz ladder with an entirely flat spectrum by introducing alternating gain and loss components while maintaining inversion *** interference generates a flat spectrum at the exceptional point,where the Creutz ladder maintains coalesced and degenerate eigenvalues with compact localized states distributed in a single *** excitations are completely confined within the localization area,unaffected by gain and ***-site excitations exhibit nonunitary dynamics with intensities increasing due to level coalescence,while multiple-site excitations may display oscillating or constant intensities at the exceptional *** results provide insights into the fascinating dynamics of non-Hermitian localization,where level coalescence and degeneracy coexist at the exceptional point.

关键词： exceptional excitation oscillating

exceptional Cycles in the Bounded Derived Categories of Quivers

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2020年第3期36卷 207-223页

作者： Peng GUO Pu ZHANG School of Mathematical Sciences Shanghai Jiao Tong UniversityShanghai 200240P.R.C hina

An exceptional n-cycle in a Hom-finite triangulated category with Serre functor has been recently introduced by Broomhead,Pauksztello and *** n=1,it is a spherical *** explicitly determine all the exceptional cycles in the bounded derived category D^b(kQ)of a finite quiver Q without oriented *** particular,if Q is an Euclidean quiver,then the length type of exceptional cycles in D^b(kQ)is exactly the tubular type of Q;if Q is a Dynkin quiver of type E_m(m=6,7,8),or Q is a wild quiver,then there are no exceptional cycles in D^b(kQ);and if Q is a Dynkin quiver of type An or D_n,then the length of an exceptional cycle in D^b(kQ)is either h or h/2,where h is the Coxeter number of Q.

关键词： exceptional cycle the Coxeter number the tubular type the length type

Slim exceptional set for sums of two squares, two cubes, and two biquadrates of primes

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2019年第5期14卷 1017-1035页

作者： Rui ZHANG School of Mathematics Tianjin UniversityTianjin 300350China

We prove that,with at most O(N17/192+ε)exceptions,all even positive integers up to N are expressible in the form P1^2+P2^2+P3^3+P5^4+P6^4,where Pi,P2,……,P6 are prime *** gives large improvement of a recent result 0... 详细信息

关键词： Waring-Goldbach problem circle method exceptional set

Bergman kernel on generalized exceptional Hua domain

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2002年第3期45卷 321-334页

作者：殷慰萍赵振刚 Department of Mathematics Capital Normal University Beijing 100037 China

We have computed the Bergman kernel functions explicitly for two types of generalized exceptional Hua domains, and also studied the asymptotic behavior of the Bergman kernel function of exceptional Hua domain near bou... 详细信息

关键词： Bergman kernel function, exceptional domain, hypergeometric function, Hua domain.