首页期刊导航|中国科学:物理学 力学 天文学（英文版）
期刊信息/Journal information
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）

周光召

月刊

1674-7348

sales@scichina.org

010-64019820

100717

北京东黄城根北街16号

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。
正式出版
收录年代

    A new scheme of fully stabilized soliton microcombs

    Gui-Lu Long
    1页
      原文链接:
    • 万方数据
    • 维普

    Atom-referenced and stabilized soliton microcomb

    Rui NiuShuai WanTian-Peng HuaWei-Qiang Wang...
    2-8页
    查看更多>>摘要：For the applications of the frequency comb in microresonators,it is essential to obtain a fully frequency-stabilized microcomb laser source.In this study,we present a system for generating a fully atom-referenced stabilized soliton microcomb.The pump light around 1560.48 nm is locked to an ultra-low-expansion(ULE)cavity.This pump light is then frequency-doubled and referenced to the atomic transition of 87Rb.The repetition rate of the soliton microcomb is injection-locked to an atomic-clock-stabilized radio frequency(RF)source,leading to mHz stabilization at 1s.As a result,all comb lines have been frequency-stabilized based on the atomic reference and the ULE cavity,achieving a very high precision of approximately 18 Hz at 1 s,corresponding to the frequency stability of 9.5 x 10-14.Our approach provides a fully stabilized microcomb experiment scheme with no requirement of f-2f technique,which could be easily implemented and generalized to various photonic platforms,thus paving the way towards the ultraprecise optical sources for high precision spectroscopy.
      原文链接:
    • 万方数据
    • 维普

    High precision atom-referenced and fully frequency-stabilized soliton microcomb

    Xiangwen GuoXu Yi
    9页
      原文链接:
    • 万方数据
    • 维普

    Data driving design of high-entropy alloys for lightweight and dynamic applications

    Kaixuan CuiJunwei QiaoPeter K.LiawYong Zhang...
    10-24页
    查看更多>>摘要：The topic of high-entropy alloys is one of the focus for both physics and materials research.High-entropy alloys were usually defined as solid solution alloys,while the solid solution is different from the traditional terminal solid solution,because the solid solution without solvent element is the dominant one.The discovery of high-entropy alloys greatly extended the composition space and the possibility of creating unique micro-and nano-level structures,which can meet the demands of lightweight and dynamic applications.The relationship between the phases and the parameters for the high-entropy alloys is rather complex.The data driving design can screen the specific high-entropy alloys.The correlation between the composition and properties of high-entropy alloys can be discovered by material genetic engineering and data science.
      原文链接:
    • 万方数据
    • 维普

    Heralded entanglement between error-protected logical qubits for fault-tolerant distributed quantum computing

    Jialun LiZhihao XieYachen LiYansen Liang...
    25-33页
    查看更多>>摘要：Quantum error correction is essential for achieving reliable quantum information processing tasks,as it can mitigate the detri-mental effects of noise by encoding single-qubit information into a larger quantum system.However,the generation of distributed entanglement between logical qubits located within two spatially separated nodes presents a significant resource-intensive chal-lenge that has yet to be overcome.Here we present a heralded protocol for generating distributed entanglement between two nonlocal error-protected logical qubits.A high-dimensional single photon can evolve physical qubits into a logical qubit that entangles with the photon and then converts logical qubit-photon entanglement into entanglement between two logical qubits,when the photon state is properly tuned and an effective photon-spin interface between single photons and individual spins is exploited.Furthermore,the success of the entanglement generation is heralded by the detection of the photon,and the corre-sponding efficiency can,in principle,approach unity.These distinguished features make our protocol highly appealing for future large-scale quantum technologies.
      原文链接:
    • 万方数据
    • 维普

    Experimental observation of spontaneous symmetry breaking in a quantum phase transition

    Wen NingRi-Hua ZhengJia-Hao LüFan Wu...
    34-39页
    查看更多>>摘要：Spontaneous symmetry breaking(SSB)plays a central role in understanding a large variety of phenomena associated with phase transitions,such as superfluid and superconductivity.So far,the transition from a symmetric vacuum to a macroscopically ordered phase has been substantially explored.The process bridging these two distinct phases is critical to understanding how a classical world emerges from a quantum phase transition,but so far remains unexplored in experiment.We here report an experimental demonstration of such a process with a quantum Rabi model engineered with a superconducting circuit.We move the system from the normal phase to the superradiant phase featuring two symmetry-breaking field components,one of which is observed to emerge as the classical reality.The results demonstrate that the environment-induced decoherence plays a critical role in the SSB.
      原文链接:
    • 万方数据
    • 维普

    Type I critical dynamical scalarization and descalarization in Einstein-Maxwell-scalar theory

    Jia-Yan JiangQian ChenYunqi LiuYu Tian...
    40-58页
    查看更多>>摘要：We investigated the critical dynamical scalarization and descalarization of black holes within the framework of the Einstein-Maxwell-scalar theory featuring higher-order coupling functions.Both the critical scalarization and descalarization displayed first-order phase transitions.When examining the nonlinear dynamics near the threshold,we always observed critical solutions that are linearly unstable static scalarized black holes.The critical dynamical scalarization and descalarization share certain sim-ilarities with the type I critical gravitational collapse.However,their initial configurations,critical solutions,and final outcomes differ significantly.To provide further insights into the dynamical results,we conducted a comparative analysis involving static solutions and perturbative analysis.
      原文链接:
    • 万方数据

    Taiji-TianQin-LISA network:Precisely measuring the Hubble constant using both bright and dark sirens

    Shang-Jie JinYe-Zhu ZhangJi-Yu SongJing-Fei Zhang...
    59-77页
    查看更多>>摘要：In the coming decades,the space-based gravitational-wave(GW)detectors such as Taiji,TianQin,and LISA are expected to form a network capable of detecting millihertz GWs emitted by the mergers of massive black hole binaries(MBHBs).In this work,we investigate the potential of GW standard sirens from the Taiji-TianQin-LISA network in constraining cosmological parameters.For the optimistic scenario in which electromagnetic(EM)counterparts can be detected,we predict the number of detectable bright sirens based on three different MBHB population models,i.e.,pop Ⅲ,Q3d,and Q3nod.Our results show that the Taiji-TianQin-LISA network alone could achieve a constraint precision of 0.9％for the Hubble constant,meeting the standard of precision cosmology.Moreover,the Taiji-TianQin-LISA network could effectively break the cosmological parameter degenera-cies generated by the CMB data,particularly in the dynamical dark energy models.When combined with the CMB data,the joint CMB+Taiji-TianQin-LISA data offer σ(w)=0.036 in the wCDM model,which is close to the latest constraint result obtained from the CMB+SN data.We also consider a conservative scenario in which EM counterparts are not available.Due to the precise sky localizations of MBHBs by the Taiji-TianQin-LISA network,the constraint precision of the Hubble constant is expected to reach 1.2％.In conclusion,the GW standard sirens from the Taiji-TianQin-LISA network will play a critical role in helping solve the Hubble tension and shedding light on the nature of dark energy.
      原文链接:
    • 万方数据
    • 维普

    Tensor perturbations from bounce inflation scenario in f(Q)gravity

    Kun HuTanmoy PaulTaotao Qiu
    78-92页
    查看更多>>摘要：In this paper,we construct a bounce inflation cosmological scenario in the framework of the modified symmetric teleparallel grav-ity,namely f(Q)theory,and investigate the tensor perturbations therein.As is well-known,the tensor perturbations generated in the very early Universe(inflation and pre-inflation regions)can account for the primordial gravitational waves(PGWs)that are to be detected by the next generation of GW experiments.We discuss the stability condition of the tensor perturbations in the bounce inflation process and investigate in detail the evolution of the perturbation variable.The general form of the tensor power spectrum is obtained both for large as well as small scale modes.As a result,we show both kinds of modes(short or long wavelength modes),and the tensor spectrum may get a positive tilt in the parametric range where the tensor perturbation proves to be stable—this interestingly hints an enhancement of gravitational waves'amplitude in the background of the f(Q)bounce-inflation scenario.Moreover,we study the LQC-like scenario as a specific case of our model,in which,the primordial tensor power spectrum turns out to be nearly scale-invariant on both small and large scales.
      原文链接:
    • 万方数据
    • 维普

    Intersection theory rules symbology

    Jiaqi ChenBo FengLilin Yang
    93-104页
    查看更多>>摘要：We propose a novel method to determine the structure of symbols for any family of polylogarithmic Feynman integrals.Using the d log-bases and simple formulas for the leading order and next-to-leading contributions to the intersection numbers,we give a streamlined procedure to compute the entries in the coefficient matrices of canonical differential equations,including the symbol letters and the rational coefficients.We also provide a selection rule to decide whether a given matrix element must be zero.The symbol letters are deeply related to the poles of the integrands and also have interesting connections to the geometry of Newton polytopes.Our method can be applied to many cutting-edge multi-loop calculations.The simplicity of our results also hints at the possible underlying structure in perturbative quantum field theories.
      原文链接:
    • 万方数据
    • 维普