Science China Physics, Mechanics & Astronomy最新文献_第8页

Metasurface-driven multi-degree-of-freedom control of incoherent fluorescence emission 非相干荧光发射的超表面驱动多自由度控制

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-08-25 DOI: 10.1007/s11433-026-3052-2

Cuiting Wang, Duo Shi, Zhongyang Li

引用次数: 0

Multidimensional van der Waals heterostructures unlock quantum devices 多维范德华异质结构解锁量子器件

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-08-25 DOI: 10.1007/s11433-026-3083-y

Yuqing Huang, Kaiyou Wang

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Advances from soliton resolution conjecture to soliton-like coherent structure 从孤子分辨猜想到类孤子相干结构的进展

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-29 DOI: 10.1007/s11433-026-3027-3

Cunbiao Lee, Xiaogang Deng, Bohua Sun

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A feasible highly efficient long-distance device-independent quantum secret sharing based on single-photon sources and cold-atom quantum memories 一种可行的基于单光子源和冷原子量子存储器的高效远程器件无关量子秘密共享

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-28 DOI: 10.1007/s11433-026-3023-0

Qi Zhang, Cheng Zhang, Shi-Pu Gu, Xing-Fu Wang, Wei Zhong, Ming-Ming Du, Lan Zhou, Yu-Bo Sheng

{"title":"A feasible highly efficient long-distance device-independent quantum secret sharing based on single-photon sources and cold-atom quantum memories","authors":"Qi Zhang, Cheng Zhang, Shi-Pu Gu, Xing-Fu Wang, Wei Zhong, Ming-Ming Du, Lan Zhou, Yu-Bo Sheng","doi":"10.1007/s11433-026-3023-0","DOIUrl":"10.1007/s11433-026-3023-0","url":null,"abstract":"<div>Device-independent quantum secret sharing (DI QSS) provides the highest security level for QSS. Existing DI QSS protocols require the generation of multi-partite entanglement and the long-distance entanglement distribution. The extremely low generation efficiency of current multi-partite entanglement sources (∼ 10−8) and photon transmission loss largely limit DI QSS’s practical key generation efficiency and secure photon transmission distance (less than 1 km). In the paper, we propose a highly efficient long-distance DI QSS protocol based on the single-photon source (SPS) and cold-atom quantum memories. It adopts the single photons and photon-atom interactions in quantum memories to construct long-distance multi-partite atomic entanglement. Our protocol can automatically eliminate the influence from photon transmission loss on the secure key rate by the heralded architecture and close the detection loophole by the atomic measurement. We also adopt the random key generation basis and noise preprocessing strategies to reduce the experimental requirement. The whole protocol is feasible under current experimental conditions. Compared with previous DI QSS protocols based on entanglement sources, our DI QSS protocol can increase the practical key generation efficiency by six orders of magnitude, and largely increase the secure photon transmission distance. It provides a possible approach to realize a highly efficient long-distance DI network in the near future.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628514","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

Robust Hamiltonian estimation with partial prior information via random unsharp Pauli measurements 基于随机非锐泡利测量的部分先验信息鲁棒哈密顿估计

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-28 DOI: 10.1007/s11433-026-3077-5

Xiaolin Zhang, Chaobo Xi, Yuyang Tang, Yunlong Wang, Chenhui Wang, Hong Gao, Fuli Li, Yu Xiang, Feiran Wang, Pei Zhang

{"title":"Robust Hamiltonian estimation with partial prior information via random unsharp Pauli measurements","authors":"Xiaolin Zhang, Chaobo Xi, Yuyang Tang, Yunlong Wang, Chenhui Wang, Hong Gao, Fuli Li, Yu Xiang, Feiran Wang, Pei Zhang","doi":"10.1007/s11433-026-3077-5","DOIUrl":"10.1007/s11433-026-3077-5","url":null,"abstract":"<div>Estimating expectation values of quantum Hamiltonians is a fundamental task in quantum information processing, especially for near-term quantum devices. CS and their variants provide powerful randomized measurement strategies, but they typically assume either complete knowledge of the observables or no prior information at all. In many realistic scenarios, however, only partial information about the Hamiltonian is available—for instance, a known Hamiltonian followed by an unknown one, or only the probability distribution of Pauli operators on each qubit. Here, we address this gap by introducing a unified framework based on random unsharp Pauli measurements. The randomness enables the estimation of unknown observables while we provide a multi-qubit global optimization cost function for the known part of the Hamiltonian. We further consider the scenario where only the probability distribution of Pauli matrices on each qubit is known as prior information, and we analyze two random Hamiltonian models: the Bernoulli appearance model and fixed-term sampling model. For both, we derive an optimal measurement probability distribution. Furthermore, our framework derives unbiased estimators for both the Hamiltonian and the quantum state under local unsharp measurement noise. We experimentally demonstrate the feasibility and superiority of our approach on an optical platform. This work fills an important gap in observable estimation in the regime of partial prior knowledge and provides a practical, noise-robust tool for noisy quantum devices.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628515","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

Mott-derived local moments and Kondo hybridization in a d-electron kagome lattice d电子kagome晶格中mott衍生的局部矩和Kondo杂化

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-28 DOI: 10.1007/s11433-026-3008-0

Xing Zhang, Xintong Li, Boqin Song, Yuyang Xie, Qinghong Wang, Taimin Miao, Shusen Ye, Junhao Liu, Bo Liang, Neng Cai, Hao Chen, Wenpei Zhu, Mingkai Xu, Wei-Jian Li, Shun-Li Yu, Shenjin Zhang, Fengfeng Zhang, Feng Yang, Zhimin Wang, Qinjun Peng, Hanqing Mao, Zhihai Zhu, Guodong Liu, Zuyan Xu, Yi-feng Yang, Tianping Ying, Lin Zhao, X. J. Zhou

{"title":"Mott-derived local moments and Kondo hybridization in a d-electron kagome lattice","authors":"Xing Zhang, Xintong Li, Boqin Song, Yuyang Xie, Qinghong Wang, Taimin Miao, Shusen Ye, Junhao Liu, Bo Liang, Neng Cai, Hao Chen, Wenpei Zhu, Mingkai Xu, Wei-Jian Li, Shun-Li Yu, Shenjin Zhang, Fengfeng Zhang, Feng Yang, Zhimin Wang, Qinjun Peng, Hanqing Mao, Zhihai Zhu, Guodong Liu, Zuyan Xu, Yi-feng Yang, Tianping Ying, Lin Zhao, X. J. Zhou","doi":"10.1007/s11433-026-3008-0","DOIUrl":"10.1007/s11433-026-3008-0","url":null,"abstract":"<div>Unlike canonical Kondo lattices in f-electron systems, where localized f orbitals naturally provide local moments, d-electron Kondo lattices require a distinct local-moment formation mechanism that remains elusive in bulk materials. Here, we investigate the bilayer kagome metal CsCr6Sb6, where strong correlations are expected to drive Mott physics in the kagome flat band and thereby supply the requisite local moments. Combining STM/STS and ARPES, we resolve a clear spectroscopic hierarchy. Low-temperature measurements reveal near-EF signatures, including a Fano-type density-of-states suppression and sharp quasiparticle peaks, both of which vanish upon warming and signal Kondo hybridization. In parallel, symmetric spectroscopic features at approximately 50 meV persist to substantially higher temperatures. This separation of energy and temperature scales supports a two-stage picture in which the flat band first splits into Hubbard bands via strong correlations and the occupied lower Hubbard band supplies local moments that subsequently hybridize with itinerant electrons. Our results thereby move beyond phenomenological descriptions of kagome Kondo lattice candidates and establish Mottness as the microscopic foundation linking strong correlations to Kondo lattice physics in a frustrated d-electron system.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628517","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

Metallic glasses creep through dynamic heterogeneity 金属玻璃通过动态非均质蠕变

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-28 DOI: 10.1007/s11433-026-3086-9

Jun-Qiang Wang

引用次数: 0

Photoneutron cross section data for 127I: Evaluation based on data systematics and new experiments 127I光子中子截面数据：基于数据系统学和新实验的评价

IF 7.2 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-07-28 DOI: 10.1007/s11433-026-3007-7

Qian-Kun Sun, Zi-Rui Hao, Yue Zhang, Hang-Hua Xu, Long-Xiang Liu, Sheng Jin, Kai-Jie Chen, Yu-Xuan Yang, Zhi-Cai Li, Pu Jiao, Zhen-Wei Wang, Meng-Die Zhou, Meng-Ke Xu, Xiang-Fei Wang, Yu-Long Shen, Jia-Wen Ding, Yong Zhu, Shi-Hai Yue, Li-Jun Gai, Gong-Tao Fan, Hong-Wei Wang

{"title":"Photoneutron cross section data for 127I: Evaluation based on data systematics and new experiments","authors":"Qian-Kun Sun, Zi-Rui Hao, Yue Zhang, Hang-Hua Xu, Long-Xiang Liu, Sheng Jin, Kai-Jie Chen, Yu-Xuan Yang, Zhi-Cai Li, Pu Jiao, Zhen-Wei Wang, Meng-Die Zhou, Meng-Ke Xu, Xiang-Fei Wang, Yu-Long Shen, Jia-Wen Ding, Yong Zhu, Shi-Hai Yue, Li-Jun Gai, Gong-Tao Fan, Hong-Wei Wang","doi":"10.1007/s11433-026-3007-7","DOIUrl":"10.1007/s11433-026-3007-7","url":null,"abstract":"<div>Resolving inconsistencies among historical photonuclear cross-section measurements is essential for reliable nuclear data evaluation. Significant discrepancies exist between the Livermore and Saclay datasets for the 127I(γ, n) reaction, leading to long-standing uncertainties in evaluated databases. In this work, a Bayesian neural network (BNN) framework is applied to assess the systematic consistency of existing experimental data. The evaluation predicts that Bergère et al. (1969) measurements are mutually consistent within uncertainty, whereas both Livermore Bramblett et al. (1966) and Berman et al. (1987) measurements exhibit a systematic underestimation of the cross section, while available (γ, 2n) data remain consistent across laboratories. To independently test this prediction, new high-precision measurements of the 127I(γ, n) cross section were performed at the SLEGS beamline using quasi-monochromatic γ rays produced via inverse Compton scattering. The new data, with total uncertainties below 4%, agree with the BNN evaluation and Bergè re et al. (1969) results over the full energy range, while confirming significant deviations from the Livermore measurements near the cross-section maximum. The agreement between data-driven evaluation and independent experiment demonstrates that machine-learning approaches can reliably identify systematic biases in legacy nuclear datasets. These results provide improved constraints on the 127I photoneutron cross section and establish a validated framework for modern nuclear data evaluation.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 9","pages":""},"PeriodicalIF":7.2,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628516","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

Explicit and covariant formula for thermodynamic volume in extended black hole thermodynamics 扩展黑洞热力学中热力学体积的显式协变公式

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/s11433-026-3013-0

Yong Xiao, Yu-Xiao Liu, Yu Tian, Hongbao Zhang

{"title":"Explicit and covariant formula for thermodynamic volume in extended black hole thermodynamics","authors":"Yong Xiao, Yu-Xiao Liu, Yu Tian, Hongbao Zhang","doi":"10.1007/s11433-026-3013-0","DOIUrl":"10.1007/s11433-026-3013-0","url":null,"abstract":"<div>In extended black hole thermodynamics, the cosmological constant and other couplings are treated as thermodynamic variables, yielding the first law (tilde{delta}M=Ttilde{delta}S+Omegatilde{delta} J+{cal{V}}tilde{delta}P+ldots), where (Pequiv - {Lambdaover 8 pi}). A long-standing conceptual gap in this framework is that, unlike M, T, S, Ω, and J, the thermodynamic volume (cal{V}) lacks a first-principles definition and can only be deduced from other thermodynamic quantities. This deficiency indicates that the underlying origin of (cal{V}) remains poorly understood. In this paper, we resolve this issue and provide an explicit, covariant formula for (cal{V}). We demonstrate that (cal{V}) (and the conjugate quantities of other couplings) universally decomposes into two contributions: one arising from the explicit coupling dependence of the Lagrangian, and the other from the response of the fundamental dynamical fields. This clarifies the physical meaning of the thermodynamic volume and places it on the same footing as other intrinsic thermodynamic quantities.</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":"148614218","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

Extreme-mass-ratio inspirals embedded in dark matter halo: Existence of homoclinic orbit and horizon-induced chaos 嵌入在暗物质晕中的极端质量比注入：同斜轨道和视界诱导混沌的存在

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/s11433-026-3011-6

Surajit Das, Surojit Dalui, Bum-Hoon Lee, Yi-Fu Cai

{"title":"Extreme-mass-ratio inspirals embedded in dark matter halo: Existence of homoclinic orbit and horizon-induced chaos","authors":"Surajit Das, Surojit Dalui, Bum-Hoon Lee, Yi-Fu Cai","doi":"10.1007/s11433-026-3011-6","DOIUrl":"10.1007/s11433-026-3011-6","url":null,"abstract":"<div>We study the existence of a homoclinic orbit and the onset of chaotic motion for a massive particle moving around a Schwarzschild-like black hole embedded in a Dehnen-(1, 4, 5/2) type dark matter halo, within the extreme-mass-ratio limit q = m/M ≪ 1, where m and M are the masses of the particle and the central black hole, respectively. The presence of the halo modifies the spacetime curvature and consequently deforms the effective potential governing the particle’s motion. Using the Hamiltonian formulation, we derive the conditions under which an unstable circular orbit and the associated homoclinic trajectory arise, marking the separatrix between bound and plunging motion. By analyzing the effective potential and the corresponding phase-space structure, we identify the transition from regular to chaotic dynamics in the near-horizon region. Numerical analyses through Poincaré sections and Lyapunov exponents calculations demonstrate that increasing the halo density, scale radius along with energy amplifies nonlinear effects, which leads to chaos eventually. We demonstrate that within a dark matter halo environment, the dynamical stability of particle motion can be significantly altered without violating the universal surface gravity bound on chaos. This work provides a deeper understanding of horizon-induced chaos in astrophysically realistic environments and serves as a theoretical basis for exploring its possible imprints on gravitational wave signals in extreme-mass-ratio inspirals system.</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":"148628510","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