Science China Physics, Mechanics & Astronomy最新文献

{"title":"Advancing the database security of multi-round quantum private query protocols","authors":"Fei Gao","doi":"10.1007/s11433-025-2704-2","DOIUrl":"10.1007/s11433-025-2704-2","url":null,"abstract":"","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 8","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168472","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}

{"title":"Coexistence of topological electronic bands and flat non-contractible phonon nodal lines in Cmce LuS2","authors":"Dexi Shao,&nbsp;Xinyan Lin,&nbsp;Chengtian Liang,&nbsp;Yanpeng Qi,&nbsp;Jialu Wang,&nbsp;Chenqiang Hua,&nbsp;Juefei Wu,&nbsp;Zhaopeng Guo,&nbsp;Jian Sun","doi":"10.1007/s11433-025-2719-4","DOIUrl":"10.1007/s11433-025-2719-4","url":null,"abstract":"<div><p>Superconductors featuring topological electronic and phonon states have garnered considerable attention due to their potential to facilitate novel physics and phenomena. In this study, we systematically investigate the high-pressure phase diagram of the LuS₂ system using first-principles calculations and crystal structure predictions. Our results reveal two stable phases of LuS₂ under pressure: <i>P</i>2₁/<i>c</i> (from 5 to 58.8 GPa) and <i>Cmce</i> (from 58.8 to 126 GPa). For the <i>Cmce</i> phase, the band inversion between Lu-<i>d</i> and S-<i>p</i> dominated bands leads to the formation of a nodal crown. Once including SOC, this nodal crown is fully gapped, leading to the topological metal with strong topological insulator nature. Furthermore, based on the effective phonon Hamiltonian in the bases of {Lu,S}⊗{<i>p</i>_<i>x</i>, <i>p</i>_<i>y</i>, <i>p</i>_<i>z</i>}, we identify four non-contractible phonon nodal lines traversing the BZ. Interestingly, these non-contractible phonon nodal lines are nearly dispersionless (∼0.004 THz), which gives four flat Dirac nodal phonon bands. In addition, the phonon modes leading to these four non-contractible nodal lines also host visible contribution to the electron-phonon coupling, which could benefit to theoretical and experimental research on the interplay of topological electronic states, flat nodal phonon states and superconductivity.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 9","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168470","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}

{"title":"Pursuing a general description of glassy dynamics: A percolation perspective","authors":"Zhenya Zhou,&nbsp;Jichao Qiao","doi":"10.1007/s11433-025-2693-9","DOIUrl":"10.1007/s11433-025-2693-9","url":null,"abstract":"","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 8","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167106","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}

{"title":"Atomic cubic gauche nitrogen polymerized at ambient pressure","authors":"Runteng Chen,&nbsp;Jun Zhang,&nbsp;Zelong Wang,&nbsp;Ke Lu,&nbsp;Yi Peng,&nbsp;Jianfa Zhao,&nbsp;Shaomin Feng,&nbsp;Changqing Jin","doi":"10.1007/s11433-025-2690-9","DOIUrl":"10.1007/s11433-025-2690-9","url":null,"abstract":"<div><p>Polymeric nitrogen has long been pursued as a high-energy density material but is very challenging to synthesize at ambient pressure conditions especially with light element precursors. Using a developed one pot method, we successfully synthesized the atomic polymeric nitrogen employing lithium azide as a precursor. Raman spectrum measurements detected the emerging vibrational peak at 635 cm⁻¹ for the polymerized lithium azide sample, indicating the formation of atomic cubic gauche nitrogen (cg-N) with N–N single bonds. Through systematic investigations, the preparation conditions are optimized to be 180°C with a reaction time of 3 h for obtaining atomic cubic gauche polymeric nitrogen. The one pot method achieves the quantitative synthesis of cg-N at ambient pressure using alkali metal azide as the precursors. It offers a simple way for further scalable synthesis of polymeric atomic nitrogen high energy density materials.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 9","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167109","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}

{"title":"Quantum homotopy analysis method with quantum-compatible linearization for nonlinear partial differential equations","authors":"Cheng Xue,&nbsp;Xiao-Fan Xu,&nbsp;Xi-Ning Zhuang,&nbsp;Tai-Ping Sun,&nbsp;Yun-Jie Wang,&nbsp;Ming-Yang Tan,&nbsp;Chuang-Chao Ye,&nbsp;Huan-Yu Liu,&nbsp;Yu-Chun Wu,&nbsp;Zhao-Yun Chen,&nbsp;Guo-Ping Guo","doi":"10.1007/s11433-024-2584-2","DOIUrl":"10.1007/s11433-024-2584-2","url":null,"abstract":"<div><p>Nonlinear partial differential equations (PDEs) are crucial for modeling complex fluid dynamics and are foundational to many computational fluid dynamics (CFD) applications. However, solving these nonlinear PDEs is challenging due to the vast computational resources they demand, highlighting the pressing need for more efficient computational methods. Quantum computing offers a promising but technically challenging approach to solving nonlinear PDEs. Recently, Liao [arXiv: 2406.15821] proposed a framework that leverages quantum computing to accelerate the solution of nonlinear PDEs based on the homotopy analysis method (HAM), a semi-analytical technique that transforms nonlinear PDEs into a series of linear PDEs. However, the no-cloning theorem in quantum computing poses a major limitation, where directly applying quantum simulation to each HAM step results in exponential complexity growth with the HAM truncation order. This study introduces a “quantum-compatible linearization” approach that maps the whole HAM process into a system of linear PDEs, allowing for a one-time solution using established quantum PDE solvers. Our method preserves the exponential speedup of quantum linear PDE solvers while ensuring that computational complexity increases only polynomially with the HAM truncation order. We demonstrate the efficacy of our approach by applying it to the Burgers’ equation and the Korteweg-de Vries (KdV) equation. Our approach provides a novel pathway for transforming nonlinear PDEs into linear PDEs, with potential applications to fluid dynamics. This work thus lays the foundation for developing quantum algorithms capable of solving the Navier-Stokes equations, ultimately offering a promising route to accelerate their solutions using quantum computing.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 10","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167061","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}

{"title":"Unveil the TGF-lightning relation with a large sample of TGFs detected by Insight-HXMT","authors":"Qibin Yi,&nbsp;Haoxuan Guo,&nbsp;Shaolin Xiong,&nbsp;Yi Zhao,&nbsp;Gaopeng Lu,&nbsp;Xiaobo Li,&nbsp;Chengkui Li,&nbsp;Wangchen Xue,&nbsp;Jiacong Liu,&nbsp;Chao Zheng,&nbsp;Yanqiu Zhang,&nbsp;Chenwei Wang,&nbsp;Wenjun Tan,&nbsp;Yue Huang,&nbsp;Jinpeng Zhang,&nbsp;Peng Zhang,&nbsp;Wenlong Zhang,&nbsp;Shenglun Xie,&nbsp;Zhenghang Yu,&nbsp;Xuejuan Yang,&nbsp;Qingmin Zhang,&nbsp;Liming Song,&nbsp;Shuangnan Zhang","doi":"10.1007/s11433-025-2674-5","DOIUrl":"10.1007/s11433-025-2674-5","url":null,"abstract":"<div><p>Terrestrial gamma-ray flash (TGF) is intense and brief burst of gamma-rays originating in Earth’s atmosphere. In this work, with a large sample of TGF observed by the <i>Insight</i>-HXMT from June 22, 2017 to July 30, 2024 and lightning sferics detected by the world wide lightning location network (WWLLN), we systematically investigated the temporal, spatial, and energetic relationships between the TGF and lightning sferics. More sferics associated with TGF are revealed using a novel two-step analysis method. We find that TGF always occurs in the initial stage (about 5 to 20 ms) of a lightning process (lasting about 800 ms) and that there is significant deficit in the lightning sferic during about 30 s before the TGF time. Based on the sferic-TGF time offset and the sferics rate, we identify, for the first time, that TGF-associated sferics are composed of three components: simultaneous sferics, adjacent sferics, and follow-up sferics. Compared to the average energy of background sferics (∼2200 J), simultaneous sferics have much higher average energy (∼8300 J), while adjacent sferics (∼1700 J) and follow-up sferics (∼1300 J) are somewhat lower. Interestingly, we find that as TGF becomes shorter in duration, the median energy of the simultaneous sferics increases. Moreover, based on the distance distribution, we conclude that TGF and all three components of the associated sferics should happen in a small region in the thunderstorm. These findings refresh our understanding of the TGF-lightning relation and thus have important implications on the TGF and lightning production mechanisms.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 8","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166214","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}

{"title":"Analytical solutions to the shear-induced anisotropic area reduction in frictional elastomer contact","authors":"Mingzhu Xu,&nbsp;Mengru Zhang,&nbsp;Weiting Chen,&nbsp;Ya-Pu Zhao","doi":"10.1007/s11433-025-2680-4","DOIUrl":"10.1007/s11433-025-2680-4","url":null,"abstract":"<div><p>Shear-induced contact area reduction is a common phenomenon across scales. The corresponding contact morphology controls almost all the macroscopic features of the interface, including adhesion, wear, viscoelastic properties, stiffness, and even electric resistance. It is a long-standing challenge to predict the contact morphology of nonlinear soft elastomer contact since there has been no available analytical solution. The work presented in this paper aims to fill the blank. Here, we first establish a new framework for contact morphology, which involves two evolution equations of the contact boundary. The framework decouples nonlinear contact kinematics and contact forces to formulate the corresponding initial-value problem in a modular approach. Based on this, we present analytical solutions to the shear-induced anisotropic area reduction in elastomer contact by using the method of undetermined coefficient and Boussinesq type models. We theoretically demonstrate that the shear-induced normal deformation (originated from Poynting’s effect), but not tangential deformation, governs the anisotropic area reduction. Also, the power laws of the reduction parameters for both contact area and size are provided. The results show quantitative agreement with recent simulations and experiments. Our approaches to the contact morphology of frictional contact involving soft materials may shed some light on the theoretical modeling of large deformation contact mechanics.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 8","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166592","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}

{"title":"Forecast of gravitationally lensed Type Ia supernovae time delay measurement by Muztage-Ata 1.93 m Synergy Telescope","authors":"Guanhua Rui,&nbsp;Wenwen Zheng,&nbsp;Zizhao He,&nbsp;Yiping Shu,&nbsp;Bin Hu,&nbsp;Xinzhong Er,&nbsp;Guoliang Li","doi":"10.1007/s11433-025-2670-8","DOIUrl":"10.1007/s11433-025-2670-8","url":null,"abstract":"<div><p>Strong lensing time delay measurement is a promising method to address the Hubble tension, offering a completely independent approach compared with both the cosmic microwave background analysis and the local distance ladder. As a third-party examination of the Hubble tension, this method provides a unique perspective. Strongly lensed quasar (glQSO) systems have demonstrated significant potential in tackling this issue, achieving an impressive 2% accuracy level. However, advancing to 1% or sub-percent accuracy is challenging due to several intrinsic limitations of glQSOs. Fortunately, strongly lensed supernovae (glSNe) offer a more robust solution, thanks to their characteristic light curve, significant brightness variations, and additional advantages. The Muztagh-Ata 1.93 m Synergy Telescope (MOST) is an exceptional instrument for monitoring strong lensing time delays. In this study, we simulate the follow-up multi-band light curve monitoring for glSNe Ia systems, which are expected to be firstly discovered by the Chinese Survey Space Telescope (CSST). The simulation employs the W7 model, integrating strong lensing and microlensing effects. Our results show that with 300 s × 9 exposures in each epoch, 2 quadruple-image systems and 14 double-image systems are observable by MOST each year. MOST can achieve a signal-to-noise ratio (SNR) of approximately 50 for the brightest images of glSNe Ia, while even the faintest images maintain an SNR of at least 7. Using a standard SNe Ia light curve template for fitting, we measured the time delays. With a 2-d cadence, MOST achieves a relative time delay error of less than 4.9%, with the bias typically remaining below 0.57%. Finally, we performed a Hubble parameter estimation. For a typical glSNe Ia system, the <i>H</i>₀ error is about ±1.8 kms⁻¹ Mpc⁻¹. This result is comparable or even better than those from LSST. This study highlights the capability of MOST to significantly advance the precision of time delay measurements, offering a promising path toward resolving the Hubble tension.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 8","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165851","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}

{"title":"Challenges of simulating fluid flows on near-term quantum computer","authors":"Zhaoyuan Meng,&nbsp;Chao Song,&nbsp;Yue Yang","doi":"10.1007/s11433-024-2552-6","DOIUrl":"10.1007/s11433-024-2552-6","url":null,"abstract":"","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 10","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145166672","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}

{"title":"Combining strongly lensed and unlensed fast radio bursts: To be a more precise late-universe probe","authors":"Ji-Guo Zhang,&nbsp;Yi-Fan Jiang,&nbsp;Ze-Wei Zhao,&nbsp;Jing-Zhao Qi,&nbsp;Jing-Fei Zhang,&nbsp;Xin Zhang","doi":"10.1007/s11433-024-2647-2","DOIUrl":"10.1007/s11433-024-2647-2","url":null,"abstract":"<div><p>The Macquart relation and time-delay cosmography are now two promising ways to fast radio burst (FRB) cosmology. In this work, we propose a joint method that combines strongly lensed and unlensed FRBs for improving cosmological parameter estimation using simulated FRB data from the future sensitive coherent all-sky monitor survey, which is expected to detect a large number of FRBs including galaxy-galaxy strongly lensed events. We find that using a detectable sample of 100000 localized FRBs including 40 lensed events can simultaneously constrain the Hubble constant and the equation of state of dark energy, with high precision of <i>ε</i>(<i>H</i>₀) = 0.4% and <i>ε</i>(<i>w</i>) = 4.5% in the simplest dynamical dark energy model. The joint analysis of unlensed and lensed FRBs significantly improves the constraint on <i>H</i>₀, which could be more effective than combining either the unlensed FRBs with future gravitational wave (GW) standard sirens or the lensed FRBs with CMB. Furthermore, combining the full FRB sample with the CMB+BAO+SNe data yields <i>σ</i>(<i>H</i>₀) = 0.29 km s⁻¹ Mpc⁻¹, <i>σ</i>(<i>w</i>₀) = 0.046, and <i>σ</i>(<i>w</i>_<i>a</i>) = 0.15 in the two-parameter dynamical dark energy model, which outperforms the results from the CMB+BAO+SNe+GW data. This reinforces the cosmological implications of a multi-wavelength observational strategy in optical and radio bands. We conclude that the future FRB observations will shed light on the nature of dark energy and also the Hubble tension if enough events with long-duration lensing are incorporated.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 8","pages":""},"PeriodicalIF":7.5,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164849","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}