Science China Physics, Mechanics & Astronomy最新文献_第9页

Pressure-induced concurrent amorphization and superconductivity in topological material NbNiTe5 拓扑材料NbNiTe5的压力诱导并发非晶化和超导性

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-27 DOI: 10.1007/s11433-026-3019-8

Lingxiao Zhao, Yi Zhao, Bangshuai Zhu, Qi Wang, Cuiying Pei, Juefei Wu, Jin-Ke Bao, Wen-He Jiao, Yanpeng Qi

引用次数: 0

A template-based search for large-scale-structure-correlated anisotropy in the nanohertz gravitational-wave background using the public NANOGrav 15-year data set 基于模板的纳赫兹引力波背景下大尺度结构相关各向异性搜索，使用公共nanogravity 15年数据集

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-27 DOI: 10.1007/s11433-026-3001-3

Yun Fang

{"title":"A template-based search for large-scale-structure-correlated anisotropy in the nanohertz gravitational-wave background using the public NANOGrav 15-year data set","authors":"Yun Fang","doi":"10.1007/s11433-026-3001-3","DOIUrl":"10.1007/s11433-026-3001-3","url":null,"abstract":"<div>Recent PTA analyses reporting evidence for a nanohertz common-spectrum process motivate targeted tests of whether any anisotropic component of the stochastic gravitational-wave background (SGWB) is correlated with the nearby large-scale structure (LSS), as anticipated for an astrophysical background dominated by supermassive black hole binaries. We present the first Bayesian PTA likelihood analysis that embeds an externally observed, full-sky galaxy-survey LSS template directly as an overlap-reduction-function (ORF) component. Using the 2MASS photometric redshift (2MPZ) galaxy catalog, we construct low-multipole LSS-correlated ORF templates in two redshift slices (0 < z ⩽ 0.1 and 0.1 < z ⩽ 0.2) and model PTA cross-correlations as (Gamma_{ab}=Gamma_{ab}^{text{HD}}+Sigma_{i}epsilon_{i}Gamma_{ab}^{text{LSS}(i)}), where ϵi quantifies the amplitude of an SGWB component whose angular correlations project onto the fixed 2MPZ LSS templates. Applying this framework to the NANOGrav 15-year dataset, we find no evidence for an LSS-correlated component: the inferred ϵi values are consistent with zero in both single-bin and two-bin analyses (e.g., (epsilon_{1}=0.20_{-1.66}^{+1.68}) and (epsilon_{2}=-0.11_{-1.83}^{+2.04}); 68% credible intervals), and Bayes factors favor the isotropic Hellings-Downs hypothesis (({cal{B}}_{text{HD+LSS}_{1},text{HD}}=0.40, {cal{B}}_{text{HD+LSS}_{2},text{HD}}=0.43, {cal{B}}_{text{HD+LSS}_{1+2},text{HD}}=0.11 )). We therefore place upper limits on any 2MPZ-traced, LSS-correlated contribution to the SGWB at z < 0.2. More broadly, our framework provides a reproducible pathway for incorporating observed LSS information into PTA anisotropy searches and naturally motivates extensions to finer redshift tomography and next-generation PTA datasets.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Cascaded Rydberg antiblockade: Multi-atom excitation dynamics and entanglement 级联Rydberg反封锁：多原子激发动力学和纠缠

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-27 DOI: 10.1007/s11433-026-3006-x

Jin-Lei Wu, Jun Wu, Pei-Yao Song, Yan Wang, Ya Gao, Xue-Ke Song, Shi-Lei Su

{"title":"Cascaded Rydberg antiblockade: Multi-atom excitation dynamics and entanglement","authors":"Jin-Lei Wu, Jun Wu, Pei-Yao Song, Yan Wang, Ya Gao, Xue-Ke Song, Shi-Lei Su","doi":"10.1007/s11433-026-3006-x","DOIUrl":"10.1007/s11433-026-3006-x","url":null,"abstract":"<div>We propose a cascaded Rydberg antiblockade (RAB) regime via a Floquet modulation in four fully connected interacting atoms, which establishes a new synthetic dimension, Dicke-state lattice (DSL), in the space of collective spin excitations. By applying a global periodic driving, we synthesize an effective Hamiltonian that enables perfect state transfer across the five-site DSL with multiple programmable pathways from stepwise nearest-neighbor jumps to a single-step transition. This DSL platform further allows us to simulate a dynamic Su-Schrieffer-Heeger model, where soft quantum control is employed to achieve topologically inspired full RAB ∣0000〉 → ∣1111〉 with enhanced robustness against disorder. Moreover, by incorporating the shortcut to adiabaticity technique, we generate high-fidelity entangled twin-Fock and Greenberger-Horne-Zeilinger states on the four atoms within sub-microsecond timescales, outperforming the speed limits of conventional adiabatic protocols. Our work demonstrates a flexible and programmable synthetic dimension for quantum simulation and multipartite entanglement engineering in Rydberg atom arrays, paving the way for the future development of quantum information processing.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

SN 2021pfs: A type Ia supernova likely affected by progenitor metallicity, as revealed by comparison with its twin counterpart SN 2021pfs：一颗Ia型超新星，可能受到其前身金属丰度的影响

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-27 DOI: 10.1007/s11433-026-2999-3

Abdusamatjan Iskandar, Xiaofeng Wang, Ali Esamdin, Wenxiong Li, Xiangyun Zeng, Ruifeng Huang, Maokai Hu, Guoliang Lü, D. Andrew Howell, Curtis McCully, Samuel Wyatt, Daichi Hiramatsu, Estefania Padilla Gonzalez, Craig Pellegrino, Megan Newsome, Lluís Galbany, David J. Sand, Nathan Smith, Huei Sears

{"title":"SN 2021pfs: A type Ia supernova likely affected by progenitor metallicity, as revealed by comparison with its twin counterpart","authors":"Abdusamatjan Iskandar, Xiaofeng Wang, Ali Esamdin, Wenxiong Li, Xiangyun Zeng, Ruifeng Huang, Maokai Hu, Guoliang Lü, D. Andrew Howell, Curtis McCully, Samuel Wyatt, Daichi Hiramatsu, Estefania Padilla Gonzalez, Craig Pellegrino, Megan Newsome, Lluís Galbany, David J. Sand, Nathan Smith, Huei Sears","doi":"10.1007/s11433-026-2999-3","DOIUrl":"10.1007/s11433-026-2999-3","url":null,"abstract":"<div>We present extensive photometric and spectroscopic observations of the normal type Ia supernovae (SNe Ia) 2021pfs, which occurred in the Seyfert 2 galaxy NGC 5427 at a redshift of 0.009. SN 2021pfs reached an absolute B-band peak magnitude of Mmax(B) =−19.28 ± 0.40 mag and a post-peak decline rate of Δm15(B) =1.13 ± 0.06 mag. The observed properties of this nearby SN Ia closely resemble those of SN 2011fe, including the main optical spectroscopic features and photometric evolution. Despite their similar decline rates, SN 2021pfs rose more rapidly in the U band but more slowly in the r and i bands compared to SN 2011fe in very early phases. This photometric difference, particularly at short wavelengths, can introduce a systematic uncertainty of up to ∼12% in distance estimates. Analysis of the host galaxy’s local and global environment shows an environment consistent with producing a higher-metallicity progenitor for SN 2021pfs than that of SN 2011fe. This higher progenitor metallicity may explain the observed photometric discrepancy and the resulting distance between SN 2021pfs and SN 2011fe, though a larger sample of such “twin” SNe Ia is needed to confirm this trend and assess its impact on cosmological measurements.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Lighter Sr doping engineering the lattice anharmonicity in Ba1−xSrxSnO3−δ 轻量Sr掺杂可改变Ba1−xSrxSnO3−δ的晶格非调和性

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-27 DOI: 10.1007/s11433-026-3015-5

Binru Zhao, Shengnan Dai, Mingfang Shu, Ranran Zhang, Qing Huang, Wei Xu, Jiangtao Wu, Jinlong Jiao, Masato Hagihala, Shuki Torii, Guohua Wang, Qingyong Ren, Zhe Qu, Haidong Zhou, Jiong Yang, Jie Ma

{"title":"Lighter Sr doping engineering the lattice anharmonicity in Ba1−xSrxSnO3−δ","authors":"Binru Zhao, Shengnan Dai, Mingfang Shu, Ranran Zhang, Qing Huang, Wei Xu, Jiangtao Wu, Jinlong Jiao, Masato Hagihala, Shuki Torii, Guohua Wang, Qingyong Ren, Zhe Qu, Haidong Zhou, Jiong Yang, Jie Ma","doi":"10.1007/s11433-026-3015-5","DOIUrl":"10.1007/s11433-026-3015-5","url":null,"abstract":"<div>The synergistic effects of the oxygen vacancies and Sr doping on the lattice dynamics of perovskite Ba1−xSrxSnO3−δ (x = 0, 0.03, 0.06, 0.10) are systematically investigated through neutron powder diffraction, Raman scattering, specific heat capacity, and thermal conductivity measurements, combined with thermal-transport theoretical calculations. The introduction of the defects induces local distortions and unique vibrational behaviors, and has been observed by different measurements. The existence of the oxygen vacancies activates several Raman spectra that are otherwise not active in vacancy-free BaSnO3, and the Sr doping further introduces more Raman excitations. On heat capacity, the defect-induced optical phonons enhance the intensity of the Boson peak and move the peak value to a lower temperature region. Furthermore, the defects not only significantly reduce the lattice thermal conductivities (κL) by lowering the sound velocity and strengthening the lattice anharmonicity, but also cause the temperature-independent κL due to the large contribution of the coherent thermal conductivity. This work establishes a structure-dynamics-transport relationship in the defect-engineered perovskite oxides and paves the path to achieve intrinsically low thermal conductivity in other materials.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Spatiotemporal elastic-wave vortices enabled by symmetry-breaking metagratings 时空弹性波涡是由对称破缺的超聚合所产生的

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-27 DOI: 10.1007/s11433-026-3020-y

Haifei Zhu, Jiazhou Chen, Shuo Yang, Houyou Long, Jixing Qin, Ying Cheng, Xiaojun Liu

{"title":"Spatiotemporal elastic-wave vortices enabled by symmetry-breaking metagratings","authors":"Haifei Zhu, Jiazhou Chen, Shuo Yang, Houyou Long, Jixing Qin, Ying Cheng, Xiaojun Liu","doi":"10.1007/s11433-026-3020-y","DOIUrl":"10.1007/s11433-026-3020-y","url":null,"abstract":"<div>Wave vortices, structures carrying helical phase fronts and orbital angular momentum (OAM), drive transformative advances in fields from super-resolution imaging to high-capacity communications. Yet in elastic wave physics, a fundamental constraint has persisted: the quasi-two-dimensional confinement of Lamb waves suppresses the out-of-plane phase helicity required for conventional vortex formation. Here, this restriction is lifted through the realization of a spatiotemporal elastic-wave vortex (STEV) carrying transverse OAM, enabled by a mirror-symmetry-broken metagrating operating on A0-mode Lamb waves. The structure simultaneously performs spatial and temporal differentiation on the incident pulse, encoding a spiral phase in momentum-frequency space that maps to a propagating wave packet with a vanishing central amplitude and 2π phase winding. This passive platform couples dark modes to radiation and engineers a transfer function that acts as an intrinsic spatiotemporal differentiator. Laser vibrometry confirms the phase singularity and its dynamic evolution, while edge-detection demonstrations on amplitude-modulated pulses illustrate the structure’s potential for real-time ultrasonic image processing. By circumventing the geometric constraints that have long confined elastic vortex phenomena, our work establishes a compact architecture for spatiotemporal pulse shaping in solids, opening routes to contactless particle manipulation, on-chip nondestructive evaluation, and wave-based analog computing in the elastic domain.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Forecast on f(R) gravity with HI 21-cm intensity mapping surveys 利用HI 21厘米强度测图预报f(R)重力

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-27 DOI: 10.1007/s11433-026-3009-5

Yanling Song, Yu Sang, Linfeng Xiao, Bin Wang

{"title":"Forecast on f(R) gravity with HI 21-cm intensity mapping surveys","authors":"Yanling Song, Yu Sang, Linfeng Xiao, Bin Wang","doi":"10.1007/s11433-026-3009-5","DOIUrl":"10.1007/s11433-026-3009-5","url":null,"abstract":"<div>Modified gravity theories offer a well-motivated extension of General Relativity and provide a possible explanation for the late-time accelerated expansion of the Universe. Among them, f(R) gravity represents a minimal and theoretically appealing class, characterized by the Compton wavelength parameter B0, which quantifies deviations from General Relativity. In this work, we explore the capability of future neutral hydrogen (HI) 21-cm intensity mapping (IM) observations to constrain f(R) gravity at low redshifts. We perform Fisher-matrix forecasts for B0 and standard cosmological parameters using upcoming 21-cm IM experiments, including BINGO and SKA1-MID (Band 1 and Band 2), both individually and in combination with Planck cosmic microwave background (CMB) priors. For the phenomenological HI treatment, we obtain σ(B0) = 3.73 × 10−6, 5.98 × 10−6, and 6.78 × 10−8 for BINGO, SKA1-MID Band 1, and Band 2, respectively, and the tightest bound is improved to 3.95 × 10−8 when Planck priors are included. We further consider a redshift-dependent HI model with fixed ΩHI(z) and bHI(z), and find that the constraints remain of similar order, confirming the robustness of the results. In both cases, SKA1-MID Band 2 provides the strongest sensitivity, while foreground residuals degrade the constraints but do not change the main conclusion that future HI intensity mapping, especially combined with CMB data, can provide stringent tests of General Relativity on cosmological scales.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

A new synthetic dimension in Rydberg atom arrays 里德伯原子阵列中一个新的合成维度

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-24 DOI: 10.1007/s11433-026-3044-9

Lin Li

引用次数: 0

Revisiting the 127I photoneutron cross sections with machine learning and new experiments at SLEGS 用机器学习和SLEGS的新实验重新访问127I光子中子截面

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-24 DOI: 10.1007/s11433-026-3028-1

Yi-Fei Niu

引用次数: 0

Relaxation dynamics of binary colloidal glass-forming liquids in microgravity 微重力下二元胶体玻璃形成液体的弛豫动力学

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-24 DOI: 10.1007/s11433-026-3003-7

Zhongyu Zheng, Chen Zhang, Weibin Li, Yuren Wang

{"title":"Relaxation dynamics of binary colloidal glass-forming liquids in microgravity","authors":"Zhongyu Zheng, Chen Zhang, Weibin Li, Yuren Wang","doi":"10.1007/s11433-026-3003-7","DOIUrl":"10.1007/s11433-026-3003-7","url":null,"abstract":"<div>We investigate the equilibrium dynamics of binary colloidal hard spheres in microgravity using differential dynamic microscopy (DDM), over a broad range of volume fractions (ϕ) from semi-dilute to highly concentrated suspensions. The intermediate scattering functions exhibit typical features of glass-forming liquids characterized by a double-stretched exponential decay. The system remains ergodic above the mode-coupling theory singularity ϕC, where the increase of relaxation time τα follows the generalized Vogel-Fulcher-Tammann law, resulting in a much higher critical density ϕ0.. Similar phenomena have been observed in previous ground-based experiments. However, compared with the microgravity condition, the relaxation above ϕC is much slower under gravity. The characteristic time of the slow decay exhibits a Brownian-like dispersion with wave number, by which an effective diffusion coefficient DS is determined. The increase of 1/DS upon supercooling confirms again the above behavior of τα. Our results support the prediction of a lower glass transition density due to the dramatically accelerated aging by gravity. DDM provides a practical method for the space-based research of colloidal suspensions.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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