Science China Physics, Mechanics & Astronomy最新文献

{"title":"Emerging nonlinear effects in magnonics: Coherent frequency mixing and multiplication","authors":"Zhejunyu Jin,&nbsp;Jinwei Rao,&nbsp;Qi Wang,&nbsp;Guoqiang Yu,&nbsp;Xiangrong Wang,&nbsp;Peng Yan","doi":"10.1007/s11433-026-2949-4","DOIUrl":"10.1007/s11433-026-2949-4","url":null,"abstract":"<div><p>Nonlinear magnonics harnesses the intricate interactions among magnons (the quanta of spin waves) to create novel states and functionalities for next-generation information processing, surpassing the limitations of linear dynamics in energy efficiency and coherence. This review summarizes recent advances in emerging nonlinear effects induced by three- and four-magnon processes, showing their profound impact on magnon frequencies and wavefunctions across real and momentum spaces. From a semi-classical perspective, we highlight key mechanisms including magnon frequency multiplication via resonant and nonresonant second-harmonic generation, the generation of magnonic frequency combs through magnon-skyrmion and magnon-vortex scattering and phonon-assisted cascades, and the nonlinear topological magnon spin Hall effect induced by emergent gauge fields in spin textures. Transitioning to the quantum regime, we examine how magnon-magnon couplings renormalize energy levels, produce topological band structures by lifting degeneracies, and lead to non-Hermitian phenomena such as exceptional points and lines near Dirac cones. Finally, we spotlight open challenges and opportunities, including nonlinearities in moiré magnets, interaction-driven thermal magnon transport, and magnon stability in altermagnets, envisioning breakthroughs in fundamental spin physics and practical magnonic devices like tunable filters, switches, and quantum sensors.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829819","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":"Large scale mapping of [CI] and the [CI]-to-CO transition in ρ Ophiuchus molecular cloud","authors":"Jifeng Xia,&nbsp;Ningyu Tang,&nbsp;Thomas G. Bisbas,&nbsp;Chen Wang,&nbsp;Gan Luo,&nbsp;Sihan Jiao,&nbsp;Xin Lv,&nbsp;Xuejian Jiang,&nbsp;Donghui Quan,&nbsp;Jinzeng Li,&nbsp;Paul F. Goldsmith,&nbsp;Gary A. Fuller,&nbsp;Di Li","doi":"10.1007/s11433-025-2940-7","DOIUrl":"10.1007/s11433-025-2940-7","url":null,"abstract":"<div><p>Atomic carbon ([C_I]) is a key species in the carbon chemistry of the interstellar medium (ISM). Using the Submillimeter Wave Astronomy Satellite (SWAS), we conduct a [C_I](³P₁ → ³P₀) 492 GHz survey covering approximately 4 deg² of the L1688 and L1689 regions in the <i>ρ</i> Oph molecular cloud, achieving a spatial resolution of 4.25′. The derived [C_I] column densities, <i>N</i>([C_I), range from 4.85 × 10¹⁴ to 6.29 × 10¹⁷ cm⁻², corresponding to an abundance ratio <i>N</i>([C_I])/<i>N</i>(H₂) of 2.24 × 10⁻⁷ to 2.39 × 10⁻⁴, with a median value of 1.8 × 10⁻⁵. Combining observations with photodissociation region (PDR) modeling, we find that [C_I] abundance varies less than that of CO in regions with Ultraviolet intensity <i>G</i>₀ &gt; 16 and <i>N</i>(H₂) &lt; 4.6 × 10²¹ cm⁻², suggesting [C_I] is a more reliable tracer of molecular hydrogen in low-density, high-radiation environments where the [C_I]-to-CO transition occurs. Utilizing [C_I] as a direct H₂ tracer, the CO-dark gas fraction is estimated to be 0.43, meaning that 43% of the total cloud mass will be missed by conventional calculations based on CO observations but can be calibrated by [C_I] emission. The [C_I] line widths are systematically broader than those of ¹³CO, possibly due to contributions from atomic carbon. These findings provide key insights into Galactic [C_I] emission and the carbon cycle evolution in the interstellar medium. Future high-sensitivity [C_I](³P₁ → ³P₀) surveys with the Chinese Survey Space Telescope (CSST) will significantly advance our understanding of the carbon cycle evolution.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829861","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":"Probing a Lorentz-violating parameter from orbital precession of the S2 star around the galactic centre supermassive black hole","authors":"Qi Qi,&nbsp;Yu Sang,&nbsp;Xiao-Mei Kuang","doi":"10.1007/s11433-026-2960-1","DOIUrl":"10.1007/s11433-026-2960-1","url":null,"abstract":"<div><p>Testing Lorentz symmetry in strong gravitational fields provides a promising probe of extensions to general relativity. The supermassive black hole Sgr A* and the orbit of the S-stars offer a laboratory for such tests in a regime beyond weak field limit. We analyze the S2 star’s orbital data focusing on the Schwarzschild-like black hole within bumblebee gravity, where deviations from general relativity are encoded in a single Lorentz-violating parameter <i>ℓ</i>. Using a full 14-dimensional Markov Chain Monte Carlo analysis under uniform and Gaussian priors, we obtain <span>(ell = -8.01 times {10^{-5}}_{-2.09 times 10^{-4}}^{+2.77 times 10^{-4}})</span> and <span>(ell = 1.00 times {10^{-5}}_{-2.91 times 10^{-4}}^{+2.90 times 10^{-4}})</span> at 1<i>σ</i> confidence level, respectively. The results show that, with supermassive Sgr A* black hole as gravity source, the constraints on the Lorentz-violating parameter in the current model in our analysis can be tighter than those from Event Horizon Telescope imaging of Sgr A* as well as the pulsar-Sgr A* systems.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829863","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":"Governing mechanisms of structural damage from underwater contact explosions induced by shock-wave and bubble loading","authors":"Liang Zhang,&nbsp;Fu-Ren Ming,&nbsp;Xin Lin,&nbsp;Nu Zhang,&nbsp;A-Man Zhang","doi":"10.1007/s11433-026-2958-1","DOIUrl":"10.1007/s11433-026-2958-1","url":null,"abstract":"<div><p>Underwater contact explosions involve complex multi-phase moving interfaces under elastoplastic and damage-induced conditions. This study investigates shock wave propagation, bubble pulsation, and progressive damage evolution in plate structures subjected to underwater contact explosions. An experimental setup was established in a dedicated explosion water tank equipped with synchronized high-speed imaging and pressure sensors, complemented by arbitrary Lagrangian-Eulerian (ALE) simulations that account for fluid-structure interaction. The shock wave and bubble pulsation behaviors were compared between damaged and purely elastoplastic boundary conditions. The results show that both the reflection coefficient and impulse of the shock wave at the structural surface decay rapidly with decreasing stand-off distance, a trend that diminishes when the dimensionless stand-off distance <i>γ</i> exceeds 0.2. Plate rupture leads to bubble venting through the resulting cracks, which reduces internal pressure and attenuates secondary pulsation amplitude. Structural deformation and damage are primarily driven by shock-wave loading, while bubble-induced loads contribute up to 17% at a stand-off of <i>γ</i> = 0.21. These findings provide valuable insights for enhancing the safety design and shock resilience of underwater structures.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829862","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":"The implications of inflation for the last ACT","authors":"Zhichong Qiu,&nbsp;Yehuang Pang,&nbsp;Qingguo Huang","doi":"10.1007/s11433-025-2934-8","DOIUrl":"10.1007/s11433-025-2934-8","url":null,"abstract":"<div><p>We explored a parameterized slow-roll inflationary model within the ΛCDM framework, utilizing a combination of data from Planck 2018, ACT DR6, DESI DR2, and BICEP/Keck 2018 (P-ACT-LB-BK18). Additionally, we incorporated the SH0ES prior on <i>H</i>₀ (P-ACT-LB-BK18-<i>H</i>₀) to analyze the model within the early dark energy (EDE) framework. While the model with a potential <i>V</i>(<i>ϕ</i>) ∝ <i>ϕ</i>^<i>α</i> for small values of <i>α</i> still fits the data, the Starobinsky <i>R</i>² inflation falls outside the 2<i>σ</i> region. On the other hand, in a self-consistent quantum theory of gravity, higher-order corrections to <i>R</i> are typically anticipated. In response, we proposed a non-perturbative exponential <i>f</i>(<i>R</i>) inflation model, wherein the subleading corrections beyond <i>R</i>² including terms like <i>R</i>³ or <i>R</i>⁴. Using numerical calculations and Markov chain Monte Carlo (MCMC) analysis with the P-ACT-LB-BK18 data set, we demonstrate that this model can align well with the ACT-preferred value of the scalar spectral index. Additionally, within the EDE framework, it accommodates greater deviations from the original Starobinsky <i>R</i>² inflation model when incorporating the SH0ES prior on <i>H</i>₀.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829864","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":"Time crystal in the nonlinear phonon mode of the trapped ions","authors":"Yi-Ling Zhan,&nbsp;Chun-Fu Liu,&nbsp;Jin-Tao Bu,&nbsp;Kai-Feng Cui,&nbsp;Shi-Lei Su,&nbsp;Lei-Lei Yan,&nbsp;Gang Chen","doi":"10.1007/s11433-025-2959-4","DOIUrl":"10.1007/s11433-025-2959-4","url":null,"abstract":"<div><p>Time crystals constitute a novel phase of matter defined by the spontaneous breaking of time-translation symmetry. Here, we present a scheme to realize a continuous-time crystal of the vibrational phonon in the normal mode of two coupled ultra-cold ions. By utilizing two addressable standing-wave lasers and the adiabatic elimination method, we generate a controllable nonlinear phonon mode with the well-designed efficient linear gain and nonlinear damping. By controlling these parameters to satisfy the phase transition conditions of Hopf bifurcation and limit cycle phase, it exhibits stable dissipative dynamics over timescales significantly longer than the oscillation period, indicating the emergence of continuous time-translation symmetry breaking in the phonon mode, i.e., a phonon time crystal. We further numerically simulate this phonon time crystal by using accessible experimental parameters and also demonstrate its robustness to the initial thermal state and thermalization of phonon mode, spin dephasing, and the control errors of Rabi frequencies. These results provide a practical scheme for observing a time crystal in a nonlinear phonon mode and will advance the research of time crystals.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829915","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":"First in-flight observation with the novel coincidence readout SiPM-based detectors of DRO/GTM","authors":"Jia-Cong Liu,&nbsp;Peng Zhang,&nbsp;Jin-Peng Zhang,&nbsp;Shao-Lin Xiong,&nbsp;Zheng-Hua An,&nbsp;Ya-Qing Liu,&nbsp;Xiang Ma,&nbsp;Da-Li Zhang,&nbsp;Chao Zheng,&nbsp;Ke Gong,&nbsp;Xin-Qiao Li,&nbsp;Xiang-Yang Wen,&nbsp;Chen-Wei Wang,&nbsp;Hao-Xuan Guo,&nbsp;Wen-Jun Tan,&nbsp;Yue Wang,&nbsp;Yang-Zhao Ren,&nbsp;Wang-Chen Xue,&nbsp;Zheng-Hang Yu,&nbsp;Yan-Qiu Zhang,&nbsp;Pei-Yi Feng,&nbsp;Min Gao,&nbsp;Yue Huang,&nbsp;Xiao-Bo Li,&nbsp;Xiao-Jing Liu,&nbsp;Ping Wang,&nbsp;Jin Wang,&nbsp;Jin-Zhou Wang,&nbsp;Sheng Yang,&nbsp;Xiao-Yun Zhao,&nbsp;Shi-Jie Zheng,&nbsp;Wen-Bin Wang,&nbsp;Hong-Fei Guan,&nbsp;Rui-Xue Wang,&nbsp;Yu Su,&nbsp;Cai-Yun Shao,&nbsp;Le-Le Xu,&nbsp;Fei Zhang","doi":"10.1007/s11433-026-2954-2","DOIUrl":"10.1007/s11433-026-2954-2","url":null,"abstract":"<div><p>SiPM-based gamma-ray detector has been increasingly utilized in space telescopes. However, its performance in the space environment would be significantly degraded, especially in the low-energy band, owing to the radiation-induced noise increase of SiPM. To address this problem, we have developed and implemented a novel coincidence readout design for SiPM-based detectors of the Gamma-ray Transient Monitor (GTM) onboard the DRO-A satellite (i.e., DRO/GTM). In this paper, we report the first in-flight observation results of DRO/GTM, focusing on the validation and performance studies of the coincidence readout technology, after a brief introduction of the working mode and data type of coincidence readout. We find that GTM detectors can correctly process and label coincidence events, identify the noise signals of SiPM, and safeguard the detection sensitivity of DRO/GTM especially in the low energy band, which is critically important for scientific observations in multi-messenger astronomy era. Our results not only validate the novel design of the coincident readout of DRO/GTM but also showcase its great advantages in mitigating the problems of SiPM noise. Therefore, this technology provides a very promising solution for future SiPM-based detectors for space exploration.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829907","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":"Dissipation-driven first-order phase transition in superconductors","authors":"Xuezhu Liu,&nbsp;Ming Lu,&nbsp;Haiwen Liu,&nbsp;X. C. Xie","doi":"10.1007/s11433-025-2950-5","DOIUrl":"10.1007/s11433-025-2950-5","url":null,"abstract":"<div><p>The interplay between superconductivity and environmental dissipation opens a new frontier for exotic quantum phases. We investigate how dissipation can fundamentally alter the nature of the superconducting phase transition. Utilizing a right-eigenstate-based non-Hermitian mean-field theory, essential for ensuring physically meaningful predictions in interacting open systems, we uncover a novel mechanism where dissipation drives a first-order phase transition in an s-wave superconductor. This transition originates from the abrupt topological reconstruction of the energy spectrum associated with <span>({cal P}{cal T})</span>-symmetry breaking, thereby coinciding exactly with the <span>({cal P}{cal T})</span>-symmetry breaking point. Remarkably, and contrary to conventional wisdom, we find that moderate dissipation enhances superconductivity by increasing the density of states, whereas stronger dissipation causes its abrupt suppression. These phenomena, characterized by discontinuous jumps in observables such as superfluid density, are readily accessible in experimental platforms like ultracold atoms with engineered dissipation. Our findings establish environmental coupling as a new pathway to control the order of quantum phase transitions.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829910","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":"Nontrivial Berry phase in altermagnet CrSb","authors":"Jianhua Du,&nbsp;Xin Peng,&nbsp;Yuzhi Wang,&nbsp;Shengnan Zhang,&nbsp;Yuran Sun,&nbsp;Chunxiang Wu,&nbsp;Tingyu Zhou,&nbsp;Le Liu,&nbsp;Hangdong Wang,&nbsp;Jinhu Yang,&nbsp;Bin Chen,&nbsp;Chuanying Xi,&nbsp;Zhiwei Jiao,&nbsp;Quansheng Wu,&nbsp;Minghu Fang","doi":"10.1007/s11433-026-2957-5","DOIUrl":"10.1007/s11433-026-2957-5","url":null,"abstract":"<div><p>CrSb, as a prototypical candidate compound of altermagnetism, has attracted significant attention due to its unique magnetic properties. In this study, we combine systematic electrical transport measurements with first-principles calculations to investigate the possible realization mechanisms of topological semimetal states in CrSb and their manifestations in quantum transport phenomena. Our high-field magneto-transport measurements reveal that the magnetoresistance of CrSb exhibits no sign of saturation up to 35 T, following a distinct power-law dependence with an exponent of 1.48. The nonlinear Hall resistivity curve further indicates a multiband charge transport mechanism. Under high magnetic fields, we observe pronounced Shubnikov-de Haas (SdH) quantum oscillations and discernible Zeeman-effect-induced band splitting at 1.6 K. Systematic Fermi surface and band calculations combined with Berry phase analysis confirm the nontrivial topological character of this material (with a Berry phase approaching π). These findings not only provide crucial experimental evidence for understanding the electronic structure of CrSb, but also establish an important foundation for investigating topological quantum states in altermagnets.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829911","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":"Detection of cyclotron absorption in the radio emission of GPM 1839-10","authors":"Yunpeng Men,&nbsp;Ewan Barr,&nbsp;Yuanhong Qu,&nbsp;Csanád Horváth,&nbsp;Jinchen Jiang,&nbsp;Gregory Desvignes,&nbsp;Natasha Hurley-Walker,&nbsp;Michael Kramer,&nbsp;Rui Luo,&nbsp;Samuel J. McSweeney,&nbsp;Jason Wu","doi":"10.1007/s11433-025-2937-0","DOIUrl":"10.1007/s11433-025-2937-0","url":null,"abstract":"<div><p>GPM 1839-10 is an intriguing long-period radio transient (LPT), distinguished by its activity spanning at least three decades and its highly unusual emission characteristics. These features include orthogonal polarization mode (OPM) switches, down-drifting sub-structures, and distinct linear-to-circular polarization conversion behaviors. In this work, we present follow-up observations utilizing the FAST telescope at L-band, yielding a total of seven detected radio pulses. We find a consistent association between OPM switches and a decrease in polarized intensity. This feature strongly supports the hypothesis that the OPM switches are generated by the incoherent summation of OPMs. Our measured rotation measures (RMs) are consistent with previous observations, indicating that the magneto-ionic environment is stable. If the source is in a binary system, such stability suggests it may host a weakly magnetized companion. Crucially, we firstly observe clear evidence of a cyclotron absorption feature in one radio pulse, a signature rarely observed in radio sources. This feature allows us to infer that the magnetic field strength at the absorption site has a lower limit of tens of Gauss, which is necessary for the phenomenon to occur. This characteristic can be explained in a scenario where GPM 1839-10 possesses a weakly magnetized companion star.</p></div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"69 6","pages":""},"PeriodicalIF":7.5,"publicationDate":"2026-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11433-025-2937-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829912","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}