Science China Physics, Mechanics & Astronomy最新文献

Advances in calorimetric investigations of glasses science

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-03-26 DOI: 10.1007/s11433-024-2575-8

Yonghao Sun

引用次数: 0

Symmetric black-to-white hole solutions with a cosmological constant

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-03-21 DOI: 10.1007/s11433-024-2623-8

Zhongwen Feng, Qingquan Jiang, Yi Ling, Xiaoning Wu, Zhangping Yu

{"title":"Symmetric black-to-white hole solutions with a cosmological constant","authors":"Zhongwen Feng, Qingquan Jiang, Yi Ling, Xiaoning Wu, Zhangping Yu","doi":"10.1007/s11433-024-2623-8","DOIUrl":"10.1007/s11433-024-2623-8","url":null,"abstract":"<div><p>For a system with a Hamiltonian constraint, we demonstrate that its dynamics is invariant under different choices of the lapse function, regardless of whether the Hamiltonian incorporates quantum corrections. Applying this observation to the interior of black-to-white holes, we analyze its dynamics with different choices of the lapse function. The results explicitly show that the leading-order expansion of both metrics proposed by Rovelli et al. (Class. Quant. Grav. <b>35</b>, 225003 (2018); Class. Quant. Grav. <b>35</b>, 215010 (2018)) and Ashtekar et al. (Phys. Rev. Lett. <b>121</b>, 241301 (2018); Phys. Rev. D <b>98</b>, 126003 (2018)) exhibit identical behavior near the transition surface. Therefore, in this sense the black-to-white hole model proposed by Rovelli et al., (Class. Quant. Grav. <b>35</b>, 225003 (2018); Class. Quant. Grav. <b>35</b>, 215010 (2018)) may be interpreted as a coarse-grained version of the solution within the framework of loop quantum gravity. The black-to-white hole solutions with exact symmetry between the black hole and white hole regions are constructed by appropriately fixing the quantum parameters in the effective theory of loop quantum gravity. This approach circumvents the issue of amplification of mass, which could arise from a mass difference between the black hole and white hole, and provides a way to link the solutions obtained by minisuperspace quantization to those in the covariant approach. Finally, the black-to-white hole solutions with a cosmological constant are constructed. The numerical solutions for the interior of the black-to-white hole with a cosmological constant are obtained, and their symmetric behavior is also discussed.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 6","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11433-024-2623-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scaling law of launch velocity in laser-induced microparticle impact testing

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-03-20 DOI: 10.1007/s11433-024-2612-0

Yiping Song, Zhoupeng Gu, Minqiang Jiang, Qiuyun Yin, Chenguang Huang, Xianqian Wu

{"title":"Scaling law of launch velocity in laser-induced microparticle impact testing","authors":"Yiping Song, Zhoupeng Gu, Minqiang Jiang, Qiuyun Yin, Chenguang Huang, Xianqian Wu","doi":"10.1007/s11433-024-2612-0","DOIUrl":"10.1007/s11433-024-2612-0","url":null,"abstract":"<div><p>Laser-induced microparticle impact testing (LIPIT) is a useful method for measuring the dynamic mechanical behavior of materials under ultra-high strain rates by accelerating and launching a single microparticle at high velocity. It is important to establish a scaling law for the laser-induced microparticle launching system to optimize its configurations and improve the achievable velocity of the microparticle. In this study, the physical process of laser-induced microparticle launching is analyzed. A scaling law for the launch system is obtained by dimensional analysis. The influence of dominant dimensionless parameters on the dimensionless velocity of the microparticle is then assessed by numerical simulations. The results show that the dimensionless launch velocity of the microparticle increases with increasing dimensionless energy and dimensionless time of the laser pulse and with decreasing dimensionless thickness of metal and elastomer films and the dimensionless mass of the microparticle. Finally, the dimensionless formulas for predicting the velocity of the microparticle of the launch system with thick-metal-film and thin-metal-film configurations are determined, respectively. This study promotes the understanding of the launch mechanisms of LIPIT and provides a guideline for optimizing its configuration to achieve a wide range of impact velocities of the microparticles.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 5","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716913","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

Dust processing in the terrestrial planet-forming region of the PDS 70 disk

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-03-20 DOI: 10.1007/s11433-024-2597-5

Yao Liu, Dafa Li, Hongchi Wang, Haoran Feng, Min Fang, Fujun Du, Thomas Henning, Giulia Perotti

{"title":"Dust processing in the terrestrial planet-forming region of the PDS 70 disk","authors":"Yao Liu, Dafa Li, Hongchi Wang, Haoran Feng, Min Fang, Fujun Du, Thomas Henning, Giulia Perotti","doi":"10.1007/s11433-024-2597-5","DOIUrl":"10.1007/s11433-024-2597-5","url":null,"abstract":"<div><p>Dust grains in protoplanetary disks are the building blocks of planets. Investigating the dust composition and size, and their variation over time, is crucial for understanding the planet formation process. The PDS 70 disk is so far the only protoplanetary disk with concrete evidence for the presence of young planets. Mid-infrared spectra were obtained for PDS 70 by the Infrared Spectrograph (IRS) on the Spitzer Space Telescope (SST) and the Mid-Infrared Instrument (MIRI) on the James Webb Space Telescope (JWST) in 2007 and 2022, respectively. In this work, we investigate the dust mineralogy through a detailed decomposition of the observed mid-infrared spectra. The results show that both the dust size and crystallinity increased by a factor of about two during the two epochs of observation, indicating evident dust processing in the terrestrial planet-forming region of the PDS 70 disk. The dust size (∼ 0.8 µm) and crystallinity (∼ 6%) in the PDS 70 disk are similar to those of other disks, which implies that the two nascent planets, PDS 70b and PDS 70c located at radial distances of ∼ 22 AU and ∼ 34 AU, do not have a significant impact on the dust processing in the inner disk. The flux densities at λ ≿ 16 µm measured by JWST/MIRI are only 60% of those obtained by Spitzer/IRS. Based on self-consistent radiative transfer modeling, we found that such a strong variability in mid-infrared fluxes can be produced by adjustments to the dust density distribution and structure of the inner disk probably induced by planet-disk interaction.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 5","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716912","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

Innovations in quantum light sources advance entanglement-based QKD networks

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-03-20 DOI: 10.1007/s11433-025-2643-x

Wei Zhang

引用次数: 0

Observations of a peculiar coronal wave inside a pseudo-streamer structure

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-03-20 DOI: 10.1007/s11433-024-2610-y

Jun Li, Ruisheng Zheng, Xiaoqian Wang, Yao Chen

{"title":"Observations of a peculiar coronal wave inside a pseudo-streamer structure","authors":"Jun Li, Ruisheng Zheng, Xiaoqian Wang, Yao Chen","doi":"10.1007/s11433-024-2610-y","DOIUrl":"10.1007/s11433-024-2610-y","url":null,"abstract":"<div><p>Coronal extreme ultraviolet (EUV) waves are large-scale disturbances propagating in the corona and are closely associated with solar eruptions. They can disturb the ambient plasma over a wide temperature range, resulting in simultaneous observations in multiple EUV passbands, and the wavefronts are typically best observed in AIA 193 and 211 Å channels with temperatures ranging from 1.6 to 2 MK. Here, we report a peculiar EUV wave that was invisible in the 193 and 211 Å but appeared instead in AIA 171 Å, corresponding to a lower temperature. Driven by a coronal jet, the wave propagated at a speed of ∼560 km s<sup>−1</sup>. The differential emission measure (DEM) analysis shows that the emission of the wavefront concentrated at ∼1.25 MK, lower than the typical predominant temperatures. In addition, the fields extrapolated using the potential field source surface (PFSS) method indicate the existence of a typical pseudo-streamer structure. Hence, we propose that it is possibly the first case of an EUV wave occurring and propagating inside a pseudo-streamer, and its visibility is likely determined by the relatively cooler plasma within the pseudo-streamer.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 5","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698578","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

U(1) Dirac quantum spin liquid candidate in triangular-lattice antiferromagnet CeMgAl11O19

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-03-20 DOI: 10.1007/s11433-024-2634-9

Yantao Cao, Akihiro Koda, M. D. Le, V. Pomjakushin, Benqiong Liu, Zhendong Fu, Zhiwei Li, Jinkui Zhao, Zhaoming Tian, Hanjie Guo

{"title":"U(1) Dirac quantum spin liquid candidate in triangular-lattice antiferromagnet CeMgAl11O19","authors":"Yantao Cao, Akihiro Koda, M. D. Le, V. Pomjakushin, Benqiong Liu, Zhendong Fu, Zhiwei Li, Jinkui Zhao, Zhaoming Tian, Hanjie Guo","doi":"10.1007/s11433-024-2634-9","DOIUrl":"10.1007/s11433-024-2634-9","url":null,"abstract":"<div><p>Quantum spin liquid represents an intriguing state where electron spins are highly entangled yet spin fluctuation persists even at 0 K. Recently, the hexaaluminates <i>R</i>MgAl<sub>11</sub>O<sub>19</sub> (<i>R</i> = rare earth) have been proposed to be a platform for realizing the quantum spin liquid state with dominant Ising anisotropic correlations. Here, we report detailed low-temperature magnetic susceptibility, muon spin relaxation, and thermodynamic studies on the CeMgAl<sub>11</sub>O<sub>19</sub> single crystal. Ising anisotropy is revealed by magnetic susceptibility measurements. Muon spin relaxation and ac susceptibility measurements rule out any long-range magnetic ordering or spin freezing down to 50 mK despite the onset of spin correlations below ∼0.8 K. Instead, the spins keep fluctuating at a rate of 1.0(2) MHz at 50 mK. Specific heat results indicate a gapless excitation with a power-law dependence on temperature, <i>C</i><sub><i>m</i></sub>(<i>T</i>) ∝ <i>T</i><sup><i>α</i></sup>. The quasi-quadratic temperature dependence with <i>α</i> = 2.28(4) in zero field and linear temperature dependence in 0.25 T support the possible realization of the U(1) Dirac quantum spin liquid state.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 6","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11433-024-2634-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New theoretical information for hybrid meson search

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-03-19 DOI: 10.1007/s11433-025-2617-9

Beijiang Liu

引用次数: 0

Superconducting states in La3Ni2O7 with a parallel magnetic field 具有平行磁场的 La3Ni2O7 中的超导态

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-03-19 DOI: 10.1007/s11433-024-2632-5

Tianyang Xie, Wei Zhu

引用次数: 0

A 316 stainless steel rod impacts with a rigid flat: Theory, experiment, and numerical simulation

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2025-03-19 DOI: 10.1007/s11433-024-2611-9

Yifan Wang, Xuan Ye, Hao Yan, Tao Wang, Guangyan Huang, Zhuo Zhuang

{"title":"A 316 stainless steel rod impacts with a rigid flat: Theory, experiment, and numerical simulation","authors":"Yifan Wang, Xuan Ye, Hao Yan, Tao Wang, Guangyan Huang, Zhuo Zhuang","doi":"10.1007/s11433-024-2611-9","DOIUrl":"10.1007/s11433-024-2611-9","url":null,"abstract":"<div><p>A slender rod suffers global vibration in impact. In this study, we present the experimental, numerical, and theoretical studies of the axial responses of a 316 stainless steel rod during vertical impact with a rigid flat. Combining the contact models and the one-dimensional (1D) wave equation, we first develop a semi-analytical vertical impact model for the rods based on a unified theoretical framework, which considers different geometries of the impacting end including the hemispherical nose, the truncated conical nose, and the flat end. Furthermore, we perform free-drop experiments on these rods and numerical simulations to verify the theoretical models. The results show that the strain-rate effect hardens the rod nose and should not be ignored even at a velocity as low as a few meters per second. After the proposal of a dynamic correction factor to adjust the quasi-static contact model, the theoretical, numerical, and experimental results agree well with one another. Also, the three-dimensional (3D) FEM simulations show that the slight deviations between the experimental and the predicted results are due to the slight obliqueness of the rods in the drop. Additionally, we leverage the theoretical tool and FEM simulations to compare the mechanical responses of rods with different impacting ends, and suggestions about the selection of rod noses are obtained.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 5","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676289","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