检索结果-南通市图书馆

Larger in-plane upper critical field and superconducting diode effect observed in topological superconductor candidate InNbS_(2)nanoribbons

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第7期17卷 6686-6694页

作者： Bo Zheng Changlong Wang Xukun Feng Xiaozhen Sun Shasha Wang Dawei Qiu Xiang Ma Ruimin Li Guanglei Cheng Lan Wang Yalin Lu Peng Li Shengyuan A.Yang Bin Xiang Department of Materials Science and Engineering CAS Key Lab of Materials for Energy ConversionAnhui Laboratory of Advanced Photon Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China Research Laboratory for quantum Materials Singapore University of Technology and DesignSingapore 487372Singapore School of Microelectronics University of Science and Technology of ChinaHefei 230052China CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences University of Science and Technology of ChinaHefei 230026China Lab of Low Dimensional Magnetism and Spintronic Devices School of PhysicsHefei University of TechnologyHefei 230009China Research Laboratory for quantum Materials IAPMEUniversity of MacaoMacaoChina

Recently,the coexistence of topology and superconductivity has garnered considerable ***,the dimensionality of these materials is crucial for the realization of topological quantum ***,the naturally grown materials,especially with one-dimensional feature that exhibits the coexistence of topology and superconductivity,still face challenges in terms of experimental realization and scalability,which hinders the fundamental research development and the potential to revolutionize quantum ***,we report the first experimental synthesis of quasi-one-dimensional InNbS_(2)nanoribbons that exhibit the coexistence of topological order and superconductivity via a chemical vapor transport ***,the inplane upper critical field of InNbS_(2)nanoribbons exceeds the Pauli paramagnetic limit by more than 2.2 times,which can be attributed to the enhanced spin-orbit coupling and the weakened interlayer interaction between the NbS_(2)layers induced by the insertion of In atoms,making InNbS_(2)exhibit spin-momentum locking similar to that of monolayer NbS_(2).Moreover,for the first time,we report the superconducting diode effect in a quasi-one-dimensional superconductor system without any inherent geometric *** measured maximum efficiency is manifested as 14%,observed atμ0H≈±60 mT,and we propose that the superconducting diode effect can potentially be attributed to the presence of the nontrivial topological *** work provides a platform for studying exotic phenomena in condensed matter physics and potential applications in quantum computing and quantum information processing.

关键词： topological order superconductivity nanoribbon superconducting anisotropy superconducting diode

Cavity-enhanced metrology in an atomic spin-1 Bose−Einstein condensate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of physics 2024年第3期19卷 185-196页

作者： Renfei Zheng Jieli Qin Bing Chen Xingdong Zhao Lu Zhou School of physics Hefei University of TechnologyHefei 230009China State Key Laboratory of Precision Spectroscopy Department of PhysicsSchool of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China School of physics and Materials Science Guangzhou University230 Wai Huan Xi RoadGuangzhou Higher Education Mega CenterGuangzhou 510006China Department of physics Henan Normal UniversityXinxiang 453007China Collaborative Innovation Center of Extreme optics Shanxi UniversityTaiyuan 030006China

Atom interferometer has been proven to be a powerful tool for precision metrology. Here we propose a cavity-aided nonlinear atom interferometer, based on the quasi-periodic spin mixing dynamics of an atomic spin-1 Bose−Einstein condensate trapped in an optical cavity. We unravel that the phase sensitivity can be greatly enhanced with the cavity-mediated nonlinear interaction. The influence of encoding phase, splitting time and recombining time on phase sensitivity are carefully studied. In addition, we demonstrate a dynamical phase transition in the system. Around the criticality, a small cavity light field variation can arouse a strong response of the atomic condensate, which can serve as a new resource for enhanced sensing. This work provides a robust protocol for cavity-enhanced metrology.

关键词： nonlinear atom interferometer spin-1 Bose−Einstein condensate spin-mixing dynamics quantum Fisher information parameter estimation

Progress and realization platforms of dynamic topological photonics

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 physics B 2024年第1期33卷 75-87页

作者：闫秋辰马睿胡小永龚旗煌 State Key Laboratory for Mesoscopic physics&Department of physics Collaborative Innovation Center of Quantum Matter&Frontiers Science Center for Nano-optoelectronicsBeijing Academy of Quantum Information SciencesPeking UniversityBeijing 100871China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China Collaborative Innovation Center of Extreme optics Shanxi UniversityTaiyuan 030006China

Dynamic topological photonics is a novel research field, combining the time-domain optics and topological *** this review, the recent progress and realization platforms of dynamic topological photonics have been well *** definition, measurement methods and the evolution process of the dynamic topological photonics are demonstrated to better understand the physical diagram. This review is meant to bring the readers a different perspective on topological photonics, grasp the advanced progress of dynamic topology, and inspire ideas about future prospects.

关键词： dynamic topological photonics optical waveguide array topological optical lattice ultrafast spectroscopy

High-resolution mid-infrared single-photon upconversion ranging

在线全文

学校读者我要写书评

暂无评论

photonics Research 2024年第6期12卷 1294-1302页

作者： SHUHONG JIANG KUN HUANG TINGTING YU JIANAN FANG BEN SUN YAN LIANG QIANG HAO E.WU MING YAN HEPING ZENG State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China Chongqing Key Laboratory of Precision optics Chongqing Institute of East China Normal UniversityChongqing 401121China Collaborative Innovation Center of Extreme optics Shanxi UniversityTaiyuan 030006China School of Optical Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Research Center for quantum Sciences Shanghai 201315China Guangyang Bay Laboratory Chongqing Institute for Brain and IntelligenceChongqing 400064China

Single-photon laser ranging has widespread applications in remote sensing and target ***,highly sensitive light detection and ranging(lidar)has long been restricted in the visible or near-infrared *** appealing quest is to extend the operation wavelength into the mid-infrared(MIR)region,which calls for an infrared photon-counting system at high detection sensitivity and precise temporal ***,we devise and demonstrate an MIR upconversion lidar based on nonlinear asynchronous optical ***,the infrared probe is interrogated in a nonlinear crystal by a train of pump pulses at a slightly different repetition rate,which favors temporal optical scanning at a picosecond timing resolution and a kilohertz refreshing rate ***,the cross-correlation upconversion trace is temporally stretched by a factor of 2×10^(4),which can thus be recorded by a low-bandwidth silicon *** combination with the time-correlated photon-counting technique,the achieved effective resolution is about two orders of magnitude better than the timing jitter of the detector itself,which facilitates a ranging precision of 4μm under a low detected flux of 8×10^(−5) photons per *** presented MIR time-of-flight range finder is featured with single-photon sensitivity and high positioning resolution,which would be particularly useful in infrared sensing and imaging in photon-starved scenarios.

关键词： resolution lidar repetition

Observation of transition from superfluorescence to polariton condensation in CsPbBr3 quantum dots film

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第2期13卷 316-324页

作者： Danqun Mao Linqi Chen Zheng Sun Min Zhang Zhe-Yu Shi Yongsheng Hu Long Zhang Jian Wu Hongxing Dong Wei Xie Hongxing Xu State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200241China Key Laboratory of Materials for High-Power Laser Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences201800 ShanghaiChina Collaborative Innovation Center of Extreme optics Shanxi UniversityTaiyuanShanxi 030006China Chongqing Key Laboratory of Precision optics Chongqing Institute of East China Normal UniversityChongqing 401121China CAS Center for Excellence in Ultraintense Laser Science Shanghai 201800China School of physics and Technology Center for Nanoscience and NanotechnologyWuhan UniversityWuhan 430072China

The superfluorescence effect has received extensive attention due to the many-body physics of quantum correlation in dipole gas and the optical applications of ultrafast bright radiation field based on the cooperative quantum ***,we demonstrate not only to observe the superfluorescence effect but also to control the cooperative state of the excitons ensemble by externally applying a regulatory dimension of coupling light fields.A new quasi-particle called cooperative exciton-polariton is revealed in a light-matter hybrid structure of a perovskite quantum dot thin film spin-coated on a Distributed Bragg *** the nonlinear threshold,polaritonic condensation occurs at a nonzero momentum state on the lower polariton branch owning to the vital role of the synchronized *** phase transition from superfluorescence to polariton condensation exhibits typical signatures of a decrease of the linewidth,an increase of the macroscopic coherence as well as an accelerated radiation decay *** findings are promising for opening new potential applications for super-brightness and unconventional coherent light sources and could enable the exploitation of cooperative effects for quantum optics.

关键词： quantum condensation polar

Large-scale error-tolerant programmable interferometer fabricated by femtosecond laser writing

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3期12卷 I0028-I0040页

作者： ILYA KONDRATYEV VERONIKA IVANOVA SUREN FLDZHYAN ARTEM ARGENCHIEV NIKITA KOSTYUCHENKO SERGEY ZHURAVITSKII NIKOLAY SKRYABIN IVAN DYAKONOV MIKHAIL SAYGIN STANISLAV STRAUPE ALEXANDER KORNEEV SERGEI KULIK quantum Technology Centre and Faculty of physics M.V.Lomonosov Moscow State UniversityMoscow 119991Russia Russian quantum Center Moscow 121205Russia Laboratory of quantum Engineering of Light South Ural State UniversityChelyabinsk 454080Russia

We introduce a programmable eight-port interferometer with the recently proposed error-tolerant architecture capable of performing a broad class of *** interferometer has been fabricated with femtosecond laser writing,and it is the largest programmable interferometer of this kind to *** have demonstrated its advantageous error tolerance by showing an operation in a broad wavelength range from 920 to 980 nm,which is particularly relevant for quantum photonics due to efficient photon sources existing in this wavelength *** work highlights the importance of developing novel architectures of programmable photonics for information processing.

关键词： interferometer laser femtosecond

Light People:*** May Lau,newly elected US NAE member in Hong Kong,talks about future of photonics and women in science

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第4期13卷 602-608页

作者： Yating Wan Chenzi Guo Electrical and Computer Engineering the ComputerElectrical and Mathematical Sciences and Engineering DivisionKing Abdullah University of Science and Technology23955-6900 ThuwalSaudi Arabia Changchun Institute of optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchunChina

Editorial photonics technology remains a driving force in today’s scientific landscape,marked by continuous innovation and crossdisciplinary *** an enlighting conversation with Light:Science&Applications,*** May Lau,a pioneer in photonics research,shares her deep insights on the evolution of technologies of LEDs,lasers,challenges of hetero-epitaxy,and the future of micro-LEDs and quantum dot *** honored as a member of the US National Academy of Engineering(NAE)for her significant contributions to photonics and electronics using III-V semiconductors on silicon,*** stands out as the sole Hong Kong scholar inducted into the NAE this year,joining 114 new and 21 international *** this exclusive Light People interview,*** shares her journey as a pioneering woman in engineering,her commitment to mentorship and academia,and her perspective on advancing female representation in *** summary provided is distilled from ***’s thoughtful responses during the *** a deeper exploration of ***’s experiences and advice,the full interview is available in the Supplementary material.

关键词： interview lighting driving

Magnetic field stabilization system designed for the cold-atom coherent population-trapping clock

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 optics LETTERS 2024年第8期22卷 080202-080202页

作者： Zhan, Chang Ma, Zhu Wu, Jiatao Li, Maojie Han, Chengyin Lu, Bo Lee, Chaohong Sun Yat Sen Univ Zhuhai Campus Sch Phys & Astron Lab Quantum Engn & Quantum Metrol Zhuhai 519082 Peoples R China Shenzhen Univ Inst Quantum Precis Measurement State Key Lab Radio Frequency Heterogeneous Integr Shenzhen 518060 Peoples R China Shenzhen Univ Coll Phys & Optoelect Engn Shenzhen 518060 Peoples R China quantum Sci Ctr Guangdong Hong Kong Macao Greater Hong Kong 518045 Peoples R China

Accurate control of magnetic fields is crucial for cold-atom experiments, often necessitating custom-designed control systems due to limitations in commercially available power supplies. Here, we demonstrate precise and flexible control of a static magnetic field by employing a field-programmable gate array and a feedback loop. This setup enables us to maintain exceptionally stable current with a fractional stability of 1 ppm within 30 s. The error signal of the feedback loop exhibited a noise level of 10(-5) A. Hz(-1/2) for control bandwidths below 10 kHz. Utilizing this precise magnetic field control system, we investigate the second-order Zeeman shift in the context of cold-atom coherent population-trapping (CPT) clocks. Our analysis reveals the second-order Zeeman coefficient to be 574.21 Hz/G(2), with an uncertainty of 1.36 Hz/G(2). Consequently, the magnetic field stabilization system we developed allows us to achieve a second-order Zeeman shift below 10(-14), surpassing the long-term stability of current cold-atom CPT clocks.

关键词： cold-atom coherent popualtion-trapping clock Zeeman coefficient magnetic field stabilization system

Quasi-normal modes,emission rate,and shadow of charged AdS black holes with perfect fluid dark matter

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 physics C 2024年第8期48卷 246-256页

作者： Hao Chen Shi-Hai Dong Sepehr Hassanabadi Narges Heidari Hassan Hassanabadi School of physics and Electronic Science Zunyi Normal UniversityZunyi 563006China Research Center for quantum physics Huzhou UniversityHuzhou 313000China Centro de Investigación en Computación Instituto Politécnico NacionalUPALMMexico City 07700Mexico Department of physics University of TehranNorth Karegar AvenueTehran 14395-547Iran Faculty of physics Shahrood University of TechnologyShahroodIran Department of physics University of Hradec KrálovéRokitanského 6250003 Hradec KrálovéCzechia

In this study,we comprehensively investigated charged AdS black holes surrounded by a distinct form of dark *** particular,we focused on key elements including the Hawking temperature,quasi-normal modes(QNMs),emission rate,and *** first calculated the Hawking temperature,thereby identifying critical values such as the critical radius and maximum temperature of the black hole,essential for determining its phase *** analysis focused on the QNMs of charged AdS black holes immersed in perfect fluid dark matter(PFDM)within the massless scalar field *** the Wentzel-Kramers-Brillouin(WKB)method,we accurately derived the frequencies of these ***,we conducted a meticulous assessment of how the intensity of the PFDM parameterαinfluences the partial absorption cross sections of the black hole,along with a detailed study of the frequency variation of the energy emission *** pivotal role of geodesics in understanding astrophysical black hole characteristics is ***,we examined the influence of the dark matter parameter on photon evolution by computing the shadow radius of the black *** findings distinctly demonstrate the significant impact of the PFDM parameterαon the boundaries of this shadow,providing crucial insights into its features and *** also provide profound insights into the intricate dynamics between a charged AdS black hole,novel dark matter,and various physical phenomena,elucidating their interplay and contributing valuable knowledge to the understanding of these cosmic entities.

关键词： black hole dark matter quasi-normal modes greybody factor shadow radius