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中国科学:物理学 力学 天文学（英文版）
中国科学:物理学 力学 天文学（英文版）

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中国科学:物理学 力学 天文学（英文版）/Journal Science China(Physics, Mechanics&Astronomy)CSCDCSTPCDEISCI
查看更多>>《中国科学》是中国科学院主办、中国科学杂志社出版的自然科学专业性学术刊物。《中国科学》任务是反映中国自然科学各学科中的最新科研成果，以促进国内外的学术交流。《中国科学》以论文形式报道中国基础研究和应用研究方面具有创造性的、高水平的和有重要意义的科研成果。在国际学术界，《中国科学》作为代表中国最高水平的学术刊物也受到高度重视。国际上最具有权威的检索刊物SCI，多年来一直收录《中国科学》的论文。1999年《中国科学》夺得国家期刊奖的第一名。
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    Demonstration of controlled high-dimensional quantum teleportation

    Min-Yu LvXiao-Min HuNeng-Fei GongTie-Jun Wang...
    1-6页
    查看更多>>摘要：Controlled quantum teleportation(CQT),which is regarded as the prelude and backbone for a genuine quantum internet,reveals the cooperation,supervision,and control relationship among the sender,receiver,and controller in the quantum network within the simplest unit.Compared with low-dimensional counterparts,high-dimensional CQT can exhibit larger information trans-mission capacity and higher superiority of the controller's authority.In this article,we report a proof-of-principle experimental realization of three-dimensional(3D)CQT with a fidelity of 97.4％±0.2％.To reduce the complexity of the circuit,we simu-late a standard 4-qutrit CQT protocol in a 9x9-dimensional two-photon system with high-quality operations.The corresponding control powers are 48.1％±0.2％for teleporting a qutrit and 52.8％±0.3％for teleporting a qubit in the experiment,which are both higher than the theoretical value of control power in 2-dimensional CQT protocol(33％).The results fully demonstrate the advantages of high-dimensional multi-partite entangled networks and provide new avenues for constructing complex quantum networks.
      原文链接:
    • 万方数据
    • 维普

    Synergy between CSST galaxy survey and gravitational-wave observation:Inferring the Hubble constant from dark standard sirens

    Ji-Yu SongLing-Feng WangYichao LiZe-Wei Zhao...
    7-19页
    查看更多>>摘要：Gravitational waves(GWs)from compact binary coalescences encode the absolute luminosity distances of GW sources.Once the redshifts of GW sources are known,one can use the distance-redshift relation to constrain cosmological parameters.One way to obtain the redshifts is to localize GW sources by GW observations and then use galaxy catalogs to determine redshifts from a statistical analysis of redshift information of the potential host galaxies,commonly referred to as the dark siren method.The third-generation(3G)GW detectors are planned to work in the 2030s and will observe numerous compact binary coalescences.Using these GW events as dark sirens requires high-quality galaxy catalogs from future sky survey projects.The China Space Station Telescope(CSST)will be launched in 2024 and will observe billions of galaxies within a 17500 deg2 survey area with redshift up to z～4,providing photometric and spectroscopic galaxy catalogs.In this work,we simulate the CSST galaxy catalogs and the 5-year GW data from the 3G GW detectors and combine them to infer the Hubble constant(H0).Our results show that the measurement precision of H0 could reach the sub-percent level,meeting the standard of precision cosmology.We conclude that the synergy between CSST and the 3G GW detectors is of great significance in measuring the Hubble constant.
      原文链接:
    • 万方数据

    Advancing space-based gravitational wave astronomy:Rapid parameter estimation via normalizing flows

    Minghui DuBo LiangHe WangPeng Xu...
    20-33页
    查看更多>>摘要：Gravitational wave(GW)astronomy is witnessing a transformative shift from terrestrial to space-based detection,with missions like Taiji at the forefront.While the transition brings unprecedented opportunities for exploring massive black hole binaries(MBHBs),it also imposes complex challenges in data analysis,particularly in parameter estimation amidst confusion noise.Addressing this gap,we utilize scalable normalizing flow models to achieve rapid and accurate inference within the Taiji en-vironment.Innovatively,our approach simplifies the data's complexity,employs a transformation mapping to overcome the year-period time-dependent response function,and unveils additional multimodality in the arrival time parameter.Our method estimates MBHBs several orders of magnitude faster than conventional techniques,maintaining high accuracy even in complex backgrounds.These findings significantly enhance the efficiency of GW data analysis,paving the way for rapid detection and alerting systems and enriching our ability to explore the universe through space-based GW observation.
      原文链接:
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    A pseudoclassical theory for the wavepacket dynamics of the kicked rotor model

    Zhixing ZouJiao Wang
    34-43页
    查看更多>>摘要：In this study,we propose a generalized pseudoclassical theory for the kicked rotor model in an attempt to discern the footprints of the classical dynamics in the deep quantum regime.Compared with the previous pseudoclassical theory that applies only in the neighborhoods of the lowest two quantum resonances,the proposed theory is applicable in the neighborhoods of all quantum resonances in principle by considering the quantum effect of the free rotation at a quantum resonance.In particular,it is confirmed by simulations that the quantum wavepacket dynamics can be successfully forecasted based on the generalized pseudoclassical dynamics,offering an intriguing example where it is feasible to bridge the dynamics in the deep quantum regime to the classical dynamics.The application of the generalized pseudoclassical theory to the PT-symmetric kicked rotor is also discussed.
      原文链接:
    • 万方数据
    • 维普

    Symbology of Feynman integrals from twistor geometries

    Song HeJiahao LiuYichao TangQinglin Yang...
    44-59页
    查看更多>>摘要：We study the symbology of planar Feynman integrals in dimensional regularization by considering geometric configurations in momentum twistor space corresponding to their leading singularities(LS).Cutting propagators in momentum twistor space amounts to intersecting lines associated with loop and external dual momenta,including the special line associated with the point at infinity,which breaks dual conformal symmetry.We show that cross-ratios of intersection points on these lines,especially those on the infinity line,naturally produce symbol letters for Feynman integrals in D=4-2e,which include and generalize their LS.At one loop,we obtain all symbol letters using intersection points from quadruple cuts for integrals up to pentagon kinematics with two massive comers,which agree perfectly with canonical differential equation(CDE)results.We then obtain all two-loop letters,for up to four-mass box and one-mass pentagon kinematics,by considering more intersections arising from two-loop cuts.Finally we comment on how cluster algebras appear from this construction,and importantly how we may extend the method to non-planar integrals.
      原文链接:
    • 万方数据
    • 维普

    Phenomenology of heavy neutral gauge boson at muon collider

    Zongyang LuHonglei LiZhi-Long HanZong-Guo Si...
    60-79页
    查看更多>>摘要：Heavy neutral gauge boson Z'is proposed in many new physics models.It has rich phenomena at the future muon collider.We study the properties of Z'boson with the process ofμ+μ-→ q(q),μ+μ-→ l+l-,μ+μ-→ ZH andμ+μ-→ W+W-.The discrepancy of Z'coupling to different types of particles can be shown in the cross section distributions around the resonance peak of various decay modes.Angular distributions of the final quark or lepton in µ+µ-→ q(q)/l+l-process are sensitive to the parameters such as mass of Z'and the Z-Z'mixing angle.The interaction of new gauge boson coupling to the standard model gauge particles and Higgs boson are also studied throughμ+μ-→ ZH → l+l-b(b)and μ+μ-→ W+W-→ l+l-vl(v)l.The cross section and the final particles'angular distributions with the contribution of Z'boson differ from those processes with only standard model par-ticles.A forward-backward asymmetry defined by the angular distribution is provided to show the potential of searching for new physics at the muon collider.Especially,the beam polarization with certain value can effectively enlarge the forward-backward asymmetry.
      原文链接:
    • 万方数据
    • 维普

    Stochastic resonance of spinor condensates in optical cavity

    Zheng-Chun LiBixuan FanLu ZhouWeiping Zhang...
    80-87页
    查看更多>>摘要：Stochastic resonance is a phenomenon in which adding random noise to a system enhances the detection or transmission of a weak signal.It occurs when the noise interacts with the system's nonlinearity,thus improving signal-to-noise ratio and increasing sensitivity.Although parametric resonances in an atomic spinor Bose-Einstein condensate have been investigated,the question of whether one can observe stochastic resonance in such a system persists.In this study we propose a scheme for generating stochastic resonance in a cavity-spinor Bose-Einstein condensate coupling system.We demonstrate stochastic resonance through numerical calculations using the mean-field theory and truncated Wigner approximation methods.Furthermore,the characteris-tics of the system's response to noise and periodic signals are studied in detail.This study unravels a new scheme for observing stochastic resonance via linking atomic many-body physics with cavity quantum electrodynamics.
      原文链接:
    • 万方数据
    • 维普

    Breaking the efficiency limitations of dissipative Kerr solitons using nonlinear couplers

    Ming LiXiao-Xiao XueYan-Lei ZhangXin-Biao Xu...
    88-94页
    查看更多>>摘要：Dissipative Kerr solitons(DKS)have long been suffering from poor power conversion efficiency when driven by continuous-wave lasers.By deriving the critical coupling condition of a multimode nonlinear optics system in a generalized theoretical framework,two efficiency limitations of the conventional pump method of DKS are revealed:the effective coupling rate is too small and is also power-dependent.A general approach is provided to resolve this challenge by introducing two types of nonlinear cou-plers to couple the soliton cavity and CW input through nonlinear processes.The collective coupler opens multiple coupling channels and the self-adaptive coupler builds a power-independent effective external coupling rate to the DKS for approaching the generalized critical coupling condition,which promises near-unity power conversion efficiencies.For instance,a conversion efficiency exceeding 90％is predicted for aluminum nitride microrings with a nonlinear coupler utilizing second-harmonic gener-ation.The mechanism applies to various nonlinear processes,including Raman and Brillouin scattering,and thus paves the way for micro-solitons toward practical applications.
      原文链接:
    • 万方数据
    • 维普

    High-excited-state splitting and multimode vibrational coupling in Mn4+-activated fluoride phosphor

    Debao ZhangWanggui YeXuguang CaoJi Zhou...
    95-101页
    查看更多>>摘要：Excited-states play a crucial role in the optical absorption and luminescence of solids and hence their accurate information is highly desired.Herein,we attempt to seize the excited-states information of Mn4+ions in K2SiF6 microcrystals via measuring and calculating their variable-temperature photoluminescence excitation(PLE)spectra.At cryogenic temperatures,an unpredicted splitting of the high-excited-state is observed.Moreover,the two-split high-excited-state levels are further revealed to primarily couple with the two hyperfine split modes of quasi-localized v2 vibration in the distorted Mn-F6 octahedral configuration,whereas the coupling strengths are found to be substantially different from each other.The slightly split vibrational mode is firmly supported by the low-temperature Raman spectra.Jahn-Teller lattice distortion is believed to be responsible for the observed splitting of the electronic high-excited-state and the quasi-localized vibrational mode.
      原文链接:
    • 万方数据

    Quasi-two-dimensional strong liquid-like dynamics of surface atoms in metallic glasses

    Bing WangXuanqiao GaoRui SuPengfei Guan...
    102-109页
    查看更多>>摘要：The fast dynamic properties of the surface of metallic glasses(MGs)play a critical role in determining their potential appli-cations.However,due to the significant difference in thermal history between atomic simulation models and laboratory-made samples,the atomic-scale behaviors of the fast surface dynamics of MGs in experiments remain uncertain.Herein,we prepared model MG films with notable variations in thermal stability using a recently developed effiicient annealing protocol,and investigated their atomic-scale dynamics systematically.We found that the dynamics of surface atoms remain invariant,whereas the difference in dynamical heterogeneity between surface and interior regions increases with the improvement of thermal stability.This can be associated with the more pronounced correlation between atomic activation energy spectra and depth from the surface in samples with higher thermal stability.In addition,dynamic anisotropy appears for surface atoms,and their transverse dynamics are faster than normal components,which can also be interpreted by activation energy spectra.Our results reveal the presence of strong liquid-like atomic dynamics confined to the surface of laboratory-made MGs,illuminating the underlying mechanisms for surface engineering design,such as cold joining by ultrasonic vibrations and superlattice growth.
      原文链接:
    • 万方数据
    • 维普