Frontiers of Physics最新文献_第3页

Low-energy elastic (anti)neutrino–nucleon scattering in covariant baryon chiral perturbation theory 协变重子手性扰动理论中的低能弹性（反）中微子-核子散射

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-06-20 DOI: 10.1007/s11467-024-1417-4

Jin-Man Chen, Ze-Rui Liang, De-Liang Yao

{"title":"Low-energy elastic (anti)neutrino–nucleon scattering in covariant baryon chiral perturbation theory","authors":"Jin-Man Chen, Ze-Rui Liang, De-Liang Yao","doi":"10.1007/s11467-024-1417-4","DOIUrl":"10.1007/s11467-024-1417-4","url":null,"abstract":"<div><p>The low-energy antineutrino- and neutrino–nucleon neutral current elastic scattering is studied within the framework of the relativistic <i>SU</i>(2) baryon chiral perturbation theory up to the order of <span>({cal O}({p^{3}}))</span>. We have derived the model-independent hadronic amplitudes and extracted the form factors from them. It is found that differential cross sections d<i>σ</i>/d<i>Q</i><sup>2</sup> for the processes of (anti)neutrino–proton scattering are in good agreement with the existing MiniBooNE data in the <i>Q</i><sup>2</sup> region [0.13, 0.20] GeV<sup>2</sup>, where nuclear effects are expected to be negligible. For <i>Q</i><sup>2</sup> ≤ 0.13 GeV<sup>2</sup>, large deviation is observed, which is mainly owing to the sizeable Pauli blocking effect. Comparisons with the simulation data produced by the NuWro and GENIE Mento Carlo events generators are also discussed. The chiral results obtained in this work can be utilized as inputs in various nuclear models to achieve the goal of precise determination of the strangeness axial vector form factor, in particular when the low-energy MicroBooNE data are available in the near future.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 6","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141501329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum vortices get stretched 量子漩涡被拉伸

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-06-05 DOI: 10.1007/s11467-024-1410-y

Emanuel A. L. Henn

引用次数: 0

Stable alkali halide vapor assisted chemical vapor deposition of 2D HfSe2 templates and controllable oxidation of its heterostructures 二维 HfSe2 模板的稳定碱卤化物气相辅助化学气相沉积及其异质结构的可控氧化作用

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-06-05 DOI: 10.1007/s11467-024-1414-7

Wenlong Chu, Xilong Zhou, Ze Wang, Xiulian Fan, Xuehao Guo, Cheng Li, Jianling Yue, Fangping Ouyang, Jiong Zhao, Yu Zhou

{"title":"Stable alkali halide vapor assisted chemical vapor deposition of 2D HfSe2 templates and controllable oxidation of its heterostructures","authors":"Wenlong Chu, Xilong Zhou, Ze Wang, Xiulian Fan, Xuehao Guo, Cheng Li, Jianling Yue, Fangping Ouyang, Jiong Zhao, Yu Zhou","doi":"10.1007/s11467-024-1414-7","DOIUrl":"10.1007/s11467-024-1414-7","url":null,"abstract":"<div><p>Two-dimensional hafnium-based semiconductors and their heterostructures with native oxides have been shown unique physical properties and potential electronic and optoelectronic applications. However, the scalable synthesis methods for ultrathin layered hafnium-based semiconductor laterally epitaxy growth and its heterostructure are still restricted, also for the understanding of its formation mechanism. Herein, we report the stable sublimation of alkali halide vapor assisted synthesis strategy for high-quality 2D HfSe<sub>2</sub> nanosheets via chemical vapor deposition. Single-crystalline ultrathin 2D HfSe<sub>2</sub> nanosheets were systematically grown by tuning the growth parameters, reaching the lateral size of 6–40 µm and the thickness down to 4.5 nm. The scalable amorphous HfO<sub>2</sub> and HfSe<sub>2</sub> heterostructures were achieved by the controllable oxidation, which benefited from the approximate zero Gibbs free energy of unstable 2D HfSe<sub>2</sub> templates. The crystal structure, elemental, and time dependent Raman characterization were carried out to understand surface precipitated Se atoms and the formation of amorphous Hf–O bonds, confirming the slow surface oxidation and lattice incorporation of oxygen atoms. The relatively smooth surface roughness and electrical potential change of HfO<sub>2</sub>–HfSe<sub>2</sub> heterostructures indicate the excellent interface quality, which helps obtain the high performance memristor with high on/off ratio of 10<sup>5</sup> and long retention period over 9000 s. Our work introduces a new vapor catalysts strategy for the synthesis of lateral 2D HfSe<sub>2</sub> nanosheets, also providing the scalable oxidation of the Hf-based heterostructures for 2D electronic devices.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 3","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetic and electrical transport study of the intrinsic magnetic topological insulator MnBi2Te4 with Ge doping 掺杂 Ge 的本征磁性拓扑绝缘体 MnBi2Te4 的磁学和电学输运研究

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-05-31 DOI: 10.1007/s11467-024-1408-5

Qingwang Bai, Mingxiang Xu

{"title":"Magnetic and electrical transport study of the intrinsic magnetic topological insulator MnBi2Te4 with Ge doping","authors":"Qingwang Bai, Mingxiang Xu","doi":"10.1007/s11467-024-1408-5","DOIUrl":"10.1007/s11467-024-1408-5","url":null,"abstract":"<div><p>As an intrinsic magnetic topological insulator with magnetic order and non-trivial topological structure, MnBi<sub>2</sub>Te<sub>4</sub> is an ideal material for studying exotic topological states such as quantum anomalous Hall effect and topological axion insulating states. Here, we carry out magnetic and electrical transport measurements on (Mn<sub>1−<i>x</i></sub>Ge<sub><i>x</i></sub>)Bi<sub>2</sub>Te<sub>4</sub> (<i>x</i> = 0, 0.15, 0.30, 0.45, 0.60, and 0.75) single crystals. It is found that with increasing <i>x</i>, the dilution of magnetic moments gradually weakens the antiferromagnetic exchange interaction. Moreover, Ge doping reduces the critical field of ferromagnetic ordering, which may provide a possible way to implement the quantum anomalous Hall effect at lower magnetic field. Electrical transport measurements suggest that electrons are the dominant charge carriers, and the carrier density increases with the Ge doping ratio. Additionally, the Kondo effect is observed in the samples with <i>x</i> = 0.45, 0.60, and 0.75. Our results suggest that doping germanium is a viable way to tune the magnetic and electrical transport properties of MnBi<sub>2</sub>Te<sub>4</sub>, opening up the possibility of future applications in magnetic topological insulators.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 3","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141189840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of thermal effects on atomic Bloch oscillation 热效应对原子布洛赫振荡的影响

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-05-31 DOI: 10.1007/s11467-024-1420-9

Guoling Yin, Chi-Kin Lai, Nana Chang, Yi Liang, Dekai Mao, Xiaoji Zhou

{"title":"Influence of thermal effects on atomic Bloch oscillation","authors":"Guoling Yin, Chi-Kin Lai, Nana Chang, Yi Liang, Dekai Mao, Xiaoji Zhou","doi":"10.1007/s11467-024-1420-9","DOIUrl":"10.1007/s11467-024-1420-9","url":null,"abstract":"<div><p>Advancements in the experimental toolbox of cold atoms have enabled the meticulous control of atomic Bloch oscillation (BO) within optical lattices, thereby enhancing the capabilities of gravity interferometers. This work delves into the impact of thermal effects on Bloch oscillation in 1D accelerated optical lattices aligned with gravity by varying the system’s initial temperature. Through the application of Raman cooling, we effectively reduce the longitudinal thermal effect, stabilizing the longitudinal coherence length over the timescale of its lifetime. The atomic losses over multiple Bloch periods are measured, which are primarily attributed to transverse excitation. Furthermore, we identify two distinct inverse scaling behaviors in the oscillation lifetime scaled by the corresponding density with respect to temperatures, implying diverse equilibrium processes within or outside the Bose–Einstein condensate (BEC) regime. The competition between the system’s coherence and atomic density leads to a relatively smooth variation in the actual lifetime versus temperature. Our findings provide valuable insights into the interaction between thermal effects and BO, offering avenues for the refinement of quantum measurement technologies.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 6","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141190034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Localization–delocalization transitions in non-Hermitian Aharonov–Bohm cages 非ermitian Aharonov-Bohm 笼中的局域化-非局域化转变

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-05-31 DOI: 10.1007/s11467-024-1412-9

Xiang Li, Jin Liu, Tao Liu

{"title":"Localization–delocalization transitions in non-Hermitian Aharonov–Bohm cages","authors":"Xiang Li, Jin Liu, Tao Liu","doi":"10.1007/s11467-024-1412-9","DOIUrl":"10.1007/s11467-024-1412-9","url":null,"abstract":"<div><p>A unique feature of non-Hermitian systems is the extreme sensitivity of the eigenspectrum to boundary conditions with the emergence of the non-Hermitian skin effect (NHSE). A NHSE originates from the point-gap topology of complex eigenspectrum, where an extensive number of eigen-states are anomalously localized at the boundary driven by nonreciprocal dissipation. Two different approaches to create localization are disorder and flat-band spectrum, and their interplay can lead to the anomalous inverse Anderson localization, where the Bernoulli anti-symmetric disorder induces mobility in a full-flat band system in the presence of Aharonov–Bohm (AB) Cage. In this work, we study the localization–delocalization transitions due to the interplay of the point-gap topology, flat band and correlated disorder in the one-dimensional rhombic lattice, where both its Hermitian and non-Hermitian structures show AB cage in the presence of magnetic flux. Although it remains the coexistence of localization and delocalization for the Hermitian rhombic lattice in the presence of the random anti-symmetric disorder, it surprisingly becomes complete delocalization, accompanied by the emergence of NHSE. To further study the effects from the Bernoulli anti-symmetric disorder, we found the similar NHSE due to the interplay of the point-gap topology, correlated disorder and flat bands. Our anomalous localization–delocalization property can be experimentally tested in the classical physical platform, such as electrical circuit.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 3","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141189917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Erratum to: Effect of ambient pressures on laser-induced breakdown spectroscopy signals 勘误：环境压力对激光诱导击穿光谱信号的影响

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-05-27 DOI: 10.1007/s11467-024-1416-5

Kaifan Zhang, Weiran Song, Zongyu Hou, Zhe Wang

引用次数: 0

Strain-engineered rippling at the bilayer-MoS2 interface identified by advanced atomic force microscopy 通过先进的原子力显微镜识别双分子层-MoS2界面上的应变工程波纹

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-05-27 DOI: 10.1007/s11467-024-1409-4

Haoyu Dong, Songyang Li, Shuo Mi, Jianfeng Guo, Zhaxi Suonan, Hanxiang Wu, Yanyan Geng, Manyu Wang, Huiwen Xu, Li Guan, Fei Pang, Wei Ji, Rui Xu, Zhihai Cheng

{"title":"Strain-engineered rippling at the bilayer-MoS2 interface identified by advanced atomic force microscopy","authors":"Haoyu Dong, Songyang Li, Shuo Mi, Jianfeng Guo, Zhaxi Suonan, Hanxiang Wu, Yanyan Geng, Manyu Wang, Huiwen Xu, Li Guan, Fei Pang, Wei Ji, Rui Xu, Zhihai Cheng","doi":"10.1007/s11467-024-1409-4","DOIUrl":"10.1007/s11467-024-1409-4","url":null,"abstract":"<div><p>The van der Waals interface structures and behaviors are of great importance in determining the physical properties of two-dimensional atomic crystals and their heterostructures. The delicate interfacial properties are sensitively dependent on the mechanical behaviors of atomically thin films under external strain. Here, we investigated the strain-engineered rippling structures at the CVD-grown bilayer-MoS<sub>2</sub> interface with advanced atomic force microscopy (AFM). The in-plane compressive strain is sequentially introduced into the 1L-substrate and 2L-1L interface of bilayer-MoS<sub>2</sub> flakes via a fast-cooling process. The thermal strain-engineered rippling structures were directly visualized at the central 2H- and 3R-MoS<sub>2</sub> bilayer regions with friction force microscopy (FFM) and bimodal AFM techniques. These rippling structures can be further artificially manipulated into the beating-like rippling features and fully erased via the contact mode AFM scanning. Our results shed lights on the strain-engineered interfacial structures of two-dimensional materials and also inspire the further investigation on the interface engineering of their electronic and optical properties.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 6","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141166846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hardware-efficient and fast three-qubit gate in superconducting quantum circuits 超导量子电路中的硬件高效快速三量子位门

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-05-18 DOI: 10.1007/s11467-024-1405-8

Xiao-Le Li, Ziyu Tao, Kangyuan Yi, Kai Luo, Libo Zhang, Yuxuan Zhou, Song Liu, Tongxing Yan, Yuanzhen Chen, Dapeng Yu

{"title":"Hardware-efficient and fast three-qubit gate in superconducting quantum circuits","authors":"Xiao-Le Li, Ziyu Tao, Kangyuan Yi, Kai Luo, Libo Zhang, Yuxuan Zhou, Song Liu, Tongxing Yan, Yuanzhen Chen, Dapeng Yu","doi":"10.1007/s11467-024-1405-8","DOIUrl":"10.1007/s11467-024-1405-8","url":null,"abstract":"<div><p>While the common practice of decomposing general quantum algorithms into a collection of single- and two-qubit gates is conceptually simple, in many cases it is possible to have more efficient solutions where quantum gates engaging multiple qubits are used. In the noisy intermediate-scale quantum (NISQ) era where a universal error correction is still unavailable, this strategy is particularly appealing since it can significantly reduce the computational resources required for executing quantum algorithms. In this work, we experimentally investigate a three-qubit Controlled-CPHASE-SWAP (CCZS) gate on superconducting quantum circuits. By exploiting the higher energy levels of superconducting qubits, we are able to realize a Fredkin-like CCZS gate with a duration of 40 ns, which is comparable to typical single- and two-qubit gates realized on the same platform. By performing quantum process tomography for the two target qubits, we obtain a process fidelity of 86.0% and 81.1% for the control qubit being prepared in ∣0〉 and ∣1〉, respectively. We also show that our scheme can be readily extended to realize a general CCZS gate with an arbitrary swap angle. The results reported here provide valuable additions to the toolbox for achieving large-scale hardware-efficient quantum circuits.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 5","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141063710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Holographic images of an AdS black hole within the framework of f(R) gravity theory f(R)引力理论框架内 AdS 黑洞的全息图像

IF 6.5 2区物理与天体物理

Frontiers of Physics Pub Date : 2024-05-18 DOI: 10.1007/s11467-024-1393-8

Guo-Ping Li, Ke-Jian He, Xin-Yun Hu, Qing-Quan Jiang

{"title":"Holographic images of an AdS black hole within the framework of f(R) gravity theory","authors":"Guo-Ping Li, Ke-Jian He, Xin-Yun Hu, Qing-Quan Jiang","doi":"10.1007/s11467-024-1393-8","DOIUrl":"10.1007/s11467-024-1393-8","url":null,"abstract":"<div><p>Based on the AdS/CFT correspondence, this study employs an oscillating Gaussian source to numerically study the holographic images of an AdS black hole under <i>f</i>(<i>R</i>) gravity using wave optics. Due to the diffraction of scalar wave, it turns out that one can clearly observed the interference patten of the absolute amplitude of response function on the AdS boundary. Furthermore, it is observed that its peak increases with the <i>f</i>(<i>R</i>) parameter <i>α</i> but decreases with the global monopole <i>η</i>, frequency <i>ω</i>, and horizon <i>r</i><sub><i>h</i></sub>. More importantly, the results reveal that the holographic Einstein ring is a series of concentric striped patterns for an observer at the North Pole and that their center is analogous to a Poisson–Arago spot. This ring can evolve into a luminosity-deformed ring or two light spots when the observer is at a different position. According to geometrical optics, it is true that the size of the brightest holographic ring is approximately equal to that of the photon sphere, and the two light spots correspond to clockwise and anticlockwise light rays. In addition, holographic images for different values of black holes and optical system parameters were obtained, and different features emerged. Finally, we conclude that the holographic rings of the AdS black hole in modified gravities are more suitable and helpful for testing the existence of a gravity dual for a given material.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":573,"journal":{"name":"Frontiers of Physics","volume":"19 5","pages":""},"PeriodicalIF":6.5,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141063783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0