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

Magnetic symmetry breaking driven “inverse magnetic breakdown” in a d-wave altermagnet KV2Se2O d波交流磁体KV2Se2O中磁对称破缺驱动的“逆磁击穿”

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-02-03 DOI: 10.1007/s11433-025-2881-5

Xu Yan, Ziyin Song, Juntao Song, Zhong Fang, Hongming Weng, Quansheng Wu

{"title":"Magnetic symmetry breaking driven “inverse magnetic breakdown” in a d-wave altermagnet KV2Se2O","authors":"Xu Yan, Ziyin Song, Juntao Song, Zhong Fang, Hongming Weng, Quansheng Wu","doi":"10.1007/s11433-025-2881-5","DOIUrl":"10.1007/s11433-025-2881-5","url":null,"abstract":"<div><p>Altermagnets, combining zero net magnetization with intrinsic spin splitting, demonstrate unique quantum phenomena crucial for spintronic applications. KV<sub>2</sub>Se<sub>2</sub>O is proven to be a d-wave altermagnet with phase transition from a checkerboard-type (C-type) antiferromagnetic (AFM) state to a spin density wave (SDW) state as the temperature decreases. After phase transition, an apparent paradox emerges where angle-resolved photoemission spectroscopy (ARPES) reveals negligible Fermi surface modifications, while physical property measurement system (PPMS) measurements uncover substantial changes in transport properties. Our study explores the microscopic mechanisms governing phase-dependent transport properties of KV<sub>2</sub>Se<sub>2</sub>O based on first-principles calculations. The spin canting driven by periodic spin modulation in the SDW phase reduces the magnetic symmetry of KV<sub>2</sub>Se<sub>2</sub>O. The resultant band degeneracy lifting and Fermi surface reconstruction induce the “inverse magnetic breakdown” phenomenon, which alters carrier trajectories, modifies carrier concentration, strengthens electron-hole compensation, and ultimately accounts for the contrasting magnetic-field-dependent Hall resistivity relative to the C-type AFM state. Our work proposes an innovative method for identifying the electronic structure evolution across a phase transition from transport signatures, providing a novel paradigm for altermagnet research.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 5","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147363094","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

Explanation for spectroscopic factor quenching in knockout reactions 敲除反应中光谱因子猝灭的解释

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-02-03 DOI: 10.1007/s11433-025-2879-0

Shichang Li, Junchen Pei, Danyang Pang

引用次数: 0

Quantum Mpemba effect in dissipative spin chains at criticality 临界耗散自旋链中的量子Mpemba效应

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-02-03 DOI: 10.1007/s11433-025-2878-4

Zijun Wei, Mingdi Xu, Xiang-Ping Jiang, Haiping Hu, Lei Pan

引用次数: 0

Neural ordinary differential equations for mapping the magnetic QCD phase diagram via holography 用神经常微分方程映射全息磁QCD相图

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-02-03 DOI: 10.1007/s11433-025-2914-x

Rong-Gen Cai, Song He, Li Li, Hong-An Zeng

{"title":"Neural ordinary differential equations for mapping the magnetic QCD phase diagram via holography","authors":"Rong-Gen Cai, Song He, Li Li, Hong-An Zeng","doi":"10.1007/s11433-025-2914-x","DOIUrl":"10.1007/s11433-025-2914-x","url":null,"abstract":"<div><p>The quantum chromodynamics (QCD) phase diagram is crucial for understanding strongly interacting matter under extreme conditions, with major implications for cosmology, neutron stars, and heavy-ion collisions. We present a novel holographic QCD model utilizing neural ordinary differential equations (ODEs) to map the QCD phase diagram under magnetic field <i>B</i>, baryon chemical potential <i>μ</i><sub><i>B</i></sub>, and temperature <i>T</i>. By solving the inverse problem of constructing a gravitational theory from Lattice QCD data, we reveal an unprecedentedly rich phase structure at finite <i>B</i>, including multiple critical endpoints (CEPs) in strong magnetic fields. Specifically, for <i>B</i> = 1.618 GeV<sup>2</sup> = 2.592 × 10<sup>19</sup> Gauss, we identify two distinct CEPs at (<i>T</i><sub><i>C</i></sub> = 87.3 MeV, <i>μ</i><sub><i>C</i></sub> = 115.9 MeV) and (<i>T</i><sub><i>C</i></sub> = 78.9 MeV, <i>μ</i><sub><i>C</i></sub> = 244.0 MeV). Notably, the critical exponents vary depending on the CEP’s location, and the conventional scaling relations can be violated in the presence of strong magnetic fields. These findings significantly advance our understanding of the QCD phase structure and provide concrete predictions for experimental validation at upcoming facilities such as FAIR, JPARC-HI, and NICA.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 4","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336712","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

Geometric time delay interferometry up to 30-link: Efficient algorithm and combination library 几何时延干涉测量高达30链路：高效的算法和组合库

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-02-02 DOI: 10.1007/s11433-025-2875-0

Weisheng Huang, Pan-Pan Wang, Yu-Jie Tan, Cheng-Gang Shao

{"title":"Geometric time delay interferometry up to 30-link: Efficient algorithm and combination library","authors":"Weisheng Huang, Pan-Pan Wang, Yu-Jie Tan, Cheng-Gang Shao","doi":"10.1007/s11433-025-2875-0","DOIUrl":"10.1007/s11433-025-2875-0","url":null,"abstract":"<div><p>Time delay interferometry (TDI) serves as a crucial data preprocessing technique in space-based gravitational wave detection, primarily employed for suppressing laser noises. Geometric TDI recasts the design of TDI combinations as the construction of a virtual synthesized interferometer, thereby offering an intuitive spacetime diagram that complements traditional algebraic approaches. This work focuses on geometric TDI, presenting a high-efficiency search algorithm and establishing the most comprehensive geometric TDI combination library to date. Through a four-stage algorithmic framework comprising virtual optical path construction, laser noise residual evaluation, combination filtering with path pairing, and duplicate combination removal, we accelerate the search by more than three orders of magnitude. This advancement has enabled, for the first time, the complete enumeration of geometric TDI combinations up to 30-link. The resulting open-source library contains millions of categorized modified first-generation, second-generation, and modified second-generation TDI combinations, providing an unprecedented resource for forthcoming space-based gravitational wave detection missions.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 4","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147335975","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

Customized broadband achromatic acoustic metasurfaces with high three-dimensional focusing gain 具有高三维聚焦增益的定制宽带消色差声学超表面

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-01-27 DOI: 10.1007/s11433-025-2857-9

Sheng-Dong Zhao, Yan Gu, Wen-Zhen Qu, Dan-Dan Zhao, Jia-Wang Zhang, Chuanzeng Zhang, Hao-Wen Dong

{"title":"Customized broadband achromatic acoustic metasurfaces with high three-dimensional focusing gain","authors":"Sheng-Dong Zhao, Yan Gu, Wen-Zhen Qu, Dan-Dan Zhao, Jia-Wang Zhang, Chuanzeng Zhang, Hao-Wen Dong","doi":"10.1007/s11433-025-2857-9","DOIUrl":"10.1007/s11433-025-2857-9","url":null,"abstract":"<div><p>Achromatic acoustic metasurfaces overcome conventional narrowband limitations for broadband wavefront control yet encounter inherent conflicts between propagation-phase modulation’s inability to deliver required nonlinear compensation and resonant-phase units’ intrinsically narrow bandwidths. Furthermore, achieving high three-dimensional (3D) focusing gain with large numerical aperture necessitates large-scale metasurfaces comprising dispersion-engineered units. To address these challenges, we propose an inverse design framework based on an improved genetic algorithm (GA) to synthesize unit configurations that integrate both propagation and resonance phase mechanisms. The optimized metasurface units enable precise broadband manipulation of transmission phases and amplitudes, thereby maintaining a linear, dispersion-free phase gradient between adjacent units. This framework also establishes a rigorous sub-wavelength design methodology and analyzes the inherent trade-offs among broadband performance, high efficiency, and large numerical aperture. By integrating topology optimization with electro-acoustic analogies, the design systematically tailors the geometrical and effective material properties of metasurface units to achieve desired acoustic functionalities, which highlights the geometric robustness of the optimized topologies. The proposed achromatic metasurface composed of 28 distinct metasurface units can achieve achromatic acoustic focusing within the range of [1.5 kHz, 3.1 kHz] with a relative bandwidth of 69.6% and the numerical aperture (NA) of 0.86. A comprehensive analysis is conducted to investigate the broadband acoustic impedance tuning capabilities of simplified metasurface units, along with an evaluation of the effects of acoustic losses on wave manipulation performance. Finally, experimental validation of the full-scale achromatic metasurface confirms its capabilities of broadband focusing and high focusing gain.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 4","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147342282","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

Continuous-variable quantum secure direct communication against dual-sequence Gaussian attacks with quantum memory 利用量子存储器对抗双序列高斯攻击的连续变量量子安全直接通信

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-01-22 DOI: 10.1007/s11433-025-2871-y

Zhiyue Zuo, Zhangtao Liang, Ningyi Mao, Yijun Wang, Ying Guo

{"title":"Continuous-variable quantum secure direct communication against dual-sequence Gaussian attacks with quantum memory","authors":"Zhiyue Zuo, Zhangtao Liang, Ningyi Mao, Yijun Wang, Ying Guo","doi":"10.1007/s11433-025-2871-y","DOIUrl":"10.1007/s11433-025-2871-y","url":null,"abstract":"<div><p>Quantum secure direct communication (QSDC) promotes high security and instantaneousness in communication by conveying secret messages directly via the quantum channel. In particular, the continuous variable (CV) scheme of QSDC is already compatible with current room-temperature telecommunication networks and is very robust to the free-space background noise, making it a unique choice in certain applications. However, to date, the security proofs of CV-QSDC are poorly advanced, as the eaves-dropper Eve in these proofs is limited, either can not apply the optimal collective measurements, or does not have full access to the quantum channel. In this paper, we refine and advance the previous theory in this area, providing a tight secrecy capacity bound for the CV-QSDC protocol. We study the secrecy capacity achievable by the two-step scheme, for both (one-mode) collective Gaussian attack and two-mode Gaussian attack, from the standard Markovian assumption on the environment to a more challenging scenario with a time-like and spatial non-Markovian model. Numerical results show that the best attack strategy for Eve is the entangled attack using maximally entangled states (with a positive correlation parameter). More interestingly, we find that the protocol with the standard Markovian model can, in theory, achieve a longer transmission distance in the communication channel affected by high thermal noise.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 4","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340993","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

The impact of plunging matter on black-hole waveform 坠入物质对黑洞波形的影响

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-01-22 DOI: 10.1007/s11433-025-2877-5

Ying-Lei Tian, Hao Yang, Chen Lan, Yan-Gang Miao

引用次数: 0

Scheme for braiding Majorana zero modes in vortices using STT-matrix 利用stt矩阵编织涡旋中Majorana零模态的方案

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-01-20 DOI: 10.1007/s11433-025-2797-y

Guangyao Huang, Jibang Fu, Xiaofeng Yi, Weichen Wang, Bo Ren, Zhaohua Yang, Shichuan Xue, Xinfang Zhang, Mingtang Deng

{"title":"Scheme for braiding Majorana zero modes in vortices using STT-matrix","authors":"Guangyao Huang, Jibang Fu, Xiaofeng Yi, Weichen Wang, Bo Ren, Zhaohua Yang, Shichuan Xue, Xinfang Zhang, Mingtang Deng","doi":"10.1007/s11433-025-2797-y","DOIUrl":"10.1007/s11433-025-2797-y","url":null,"abstract":"<div><p>Majorana zero modes (MZMs), promising for topological quantum computation, are naturally hosted in vortices of two-dimensional topological superconductors (TSCs). However, precise control and braiding of these vortex-bound MZMs remain a significant challenge. This work proposes and numerically demonstrates a novel braiding scheme utilizing a programmable matrix of spintransfer torque (STT) devices (STT-matrix) integrated with a TSC layer. By selectively activating individual STT elements, their localized stray fields enable deterministic manipulation, including driving, braiding, and fusion, of superconducting vortices and their associated MZMs. We establish a comprehensive simulation framework combining finite element analysis for STT-induced vortex formation, time-dependent Ginzburg-Landau equations for vortex dynamics and time-dependent Bogoliubov-de Gennes equations for MZM evolution. Simulations confirm the STT-matrix’s capability for high-fidelity vortex manipulation and demonstrate MZM braiding dynamics. We quantify the impact of vortex acceleration and finite MZM coupling on braiding fidelity, showing that it can be optimized by adjusting STT spacing and vortex separation. Furthermore, we demonstrate controlled MZM fusion and measure the resultant energy splitting. This STT-matrix-based approach offers a highly versatile, scalable, and potentially practical platform for operating MZMs within TSC vortices, advancing the development of fault-tolerant topological quantum computation.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 4","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146082532","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

Angle-resolved multimode engineering in spacetime crystals 时空晶体中的角分辨多模工程

IF 7.5 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2026-01-20 DOI: 10.1007/s11433-025-2865-3

Zhenyu Jiang, Zhiqiang Wu, Chen Zhang, Zhuochao Tie, Xiaohang Sheng, Shaodong Zhou, Qunchao Ma, Ziyan Zhang, Jingkun Zhuang, Jijin Wang, Yan Liang, Yiming Pan, Songlin Zhuang, Qingqing Cheng

{"title":"Angle-resolved multimode engineering in spacetime crystals","authors":"Zhenyu Jiang, Zhiqiang Wu, Chen Zhang, Zhuochao Tie, Xiaohang Sheng, Shaodong Zhou, Qunchao Ma, Ziyan Zhang, Jingkun Zhuang, Jijin Wang, Yan Liang, Yiming Pan, Songlin Zhuang, Qingqing Cheng","doi":"10.1007/s11433-025-2865-3","DOIUrl":"10.1007/s11433-025-2865-3","url":null,"abstract":"<div><p>Spatiotemporally varying media, which simultaneously modulating both in space and time, offer a versatile platform for dynamic control of electromagnetic waves. The multimode properties of such media are crucial for applications in quantum simulation, large-scale optical computing, and high-capacity communication systems. Here, we present a reconfigurable approach for applying spatiotemporal electromagnetic modulation in a substrate-integrated waveguide (SIW), enabling the resolution and engineering of multiple modes in spacetime crystals (STCs). We begin by demonstrating the diffraction of Floquet modes in a time crystal, analogous to a time grating. By superimposing spatial modulation, we impart additional momentum to these modes, allowing the Floquet modes to radiate into free space at distinct, angle-resolved directions. Furthermore, by incorporating multicolor spatiotemporal modulation, we achieve precise control over the Floquet-Bloch modes, facilitating multi-user video distribution. Our approach paves the way for the engineering of multiple Floquet-Bloch modes in STCs, offering promising prospects for quantum simulation, optical computing, and next-generation wireless communications.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 4","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147340659","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