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重审道尔顿原子论的建立:1803还是1805? 被引量:2
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作者 徐雅纯 佟艺辰 《科学文化评论》 2019年第6期93-103,共11页
化学史家们往往将1803年9月的第一份相对原子质量表看作道尔顿原子论形成的时间点,但是道尔顿本人在1810年的讲座中则称原子论诞生于1805年。这一分歧源于道尔顿与化学史家们对其原子论工作的不同理解。道尔顿认定原子论的证明需从物理... 化学史家们往往将1803年9月的第一份相对原子质量表看作道尔顿原子论形成的时间点,但是道尔顿本人在1810年的讲座中则称原子论诞生于1805年。这一分歧源于道尔顿与化学史家们对其原子论工作的不同理解。道尔顿认定原子论的证明需从物理角度出发,故自称1805年完成证明。然而纵观原子论发展的历史,道尔顿无法从物理角度证明原子论,其工作实则达成了化学上的证明。因此,1803年9月实为其原子论真正形成的时间点。 展开更多
关键词 道尔顿 贝托莱-普鲁斯特之争 定比定律 化学原子论 物理原子论
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Atomic orbitals modulated dual functional bimetallic phosphides derived from MOF on MOF structure for boosting high efficient overall water splitting
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作者 Bohan An Weilong Liu +3 位作者 Jipeng Dong Ning Li Yangqin Gao Lei Ge 《Chinese Journal of Catalysis》 SCIE CAS CSCD 2024年第10期113-125,共13页
The electronic modulation characteristics of efficient metal phosphide electrocatalysts can be utilized to tune the performance of oxygen evolution reaction(OER).However,improving the overall water splitting performan... The electronic modulation characteristics of efficient metal phosphide electrocatalysts can be utilized to tune the performance of oxygen evolution reaction(OER).However,improving the overall water splitting performance remains a challenging task.By building metal organic framework(MOF)on MOF heterostructures,an efficient strategy for controlling the electrical structure of MOFs was presented in this study.ZIF-67 was in-situ synthesized on MIL-88(Fe)using a two-step self-assembly method,followed by low-temperature phosphorization to ultimately synthesize FeP-CoP_(3)bimetallic phosphides.By combining atomic orbital theory and theoretical calculations(density functional theory),the results reveal the successful modulation of electronic orbitals in FeP-CoP_(3)bimetallic phosphides,which are synthesized from MOF on MOF structure.The synergistic impact of the metal center Co species and the phase conjugation of both kinds of MOFs are responsible for this regulatory phenomenon.Therefore,the catalyst demonstrates excellent properties,demonstrating HER 81 mV(η10)in a 1.0 mol L^(−1)KOH solution and OER 239 mV(η50)low overpotentials.The FeP-CoP_(3)linked dual electrode alkaline batteries,which are bifunctional electrocatalysts,have a good electrocatalytic ability and may last for 50 h.They require just 1.49 V(η50)for total water breakdown.Through this technique,the electrical structure of electrocatalysts may be altered to increase catalytic activity. 展开更多
关键词 Transition metal phosphides MOF on MOF Atomic orbital theory Density functional theory calculation
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Study on Production of Exotic 0^+ Meson D'^*aj(2317) in Decays of ψ(4415) 被引量:1
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作者 GUO Xin-Heng KE Hong-Wei +2 位作者 LI Xue-Qian LIU Xiang ZHAO Shu-Min 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第3X期509-518,共10页
The newly observed D^*aj family containing D^*aj(2317), Daj(2460), and Daj(2632) attracts great interests. Determining their structures may be an important task for both theorists and experimentalists. In this... The newly observed D^*aj family containing D^*aj(2317), Daj(2460), and Daj(2632) attracts great interests. Determining their structures may be an important task for both theorists and experimentalists. In this work we use a non-relativistic model (the harmonic oscillator model) to evaluate the production rate of D^*aj (2317) from the decays of ψ(4415). For a comparison, we a/so employ the widely adopted heavy quark effective theory to repeat the calculation. We lind that the rate is sizable and may be observed at BES III and CLEO, if it is a p-wave excited state of Da(1968). Unfortunately, the other two members of the family cannot be observed through decays of charmonia, because of the constraints from the final state phase space. 展开更多
关键词 exotic meson quark-pair-creation model heavy quark effective theory
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Double—Pulse Spectra and Closed—Orbits:Photodetachment of H^— in parallel Electric and Magnetic Fields 被引量:5
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作者 DUMeng-Li 《Communications in Theoretical Physics》 SCIE CAS CSCD 2003年第6期705-708,共4页
We derive a formula for double-pulse spectra from closed-orbit theory. We then calculate the double-pulse photodetachment spectra of H<SUP>?</SUP> in the presence of parallel electric and magnetic fields. ... We derive a formula for double-pulse spectra from closed-orbit theory. We then calculate the double-pulse photodetachment spectra of H<SUP>?</SUP> in the presence of parallel electric and magnetic fields. We analyze the spectra in terms of closed-orbits of the system. We suggest a method for the measurement of a phase associated with each closed-orbit. 展开更多
关键词 closed-orbit theory PHOTODETACHMENT Stark effect
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Application of Exp-Function Method to Discrete Nonlinear Schrdinger Lattice Equation with Symbolic Computation 被引量:2
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作者 JI Jie 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第12期1279-1282,共4页
In this paper, we present an extended Exp-function method to differential-difference equation(s). With the help of symbolic computation, we solve discrete nonlinear Schrodinger lattice as an example, and obtain a se... In this paper, we present an extended Exp-function method to differential-difference equation(s). With the help of symbolic computation, we solve discrete nonlinear Schrodinger lattice as an example, and obtain a series of general solutions in forms of Exp-function. 展开更多
关键词 Exp-function solutions discrete nonlinear SchrSdinger lattice equation
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Teleportation of an Unknown Atomic Entangled State Without Any Joint Bell-state Measurement via a Cluster State 被引量:1
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作者 CAO Zhuo-Liang LI Da-Chuang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第2期369-372,共4页
An experimentally feasible scheme for teleportation of an unknown two-atom entangled state is proposed. Our scheme uses a duster state as the quantum channel, where we do not need any joint Bell-state measurement. Mor... An experimentally feasible scheme for teleportation of an unknown two-atom entangled state is proposed. Our scheme uses a duster state as the quantum channel, where we do not need any joint Bell-state measurement. Moreover the successful probability and fidelity of teleportation can both reach 1.0. The current scheme can be realized within the current experimental technology. 展开更多
关键词 quantum teleportation joint Bell-state measurement cavity QED quantum controlled phase gate
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Formation Mechanism and Binding Energy for Regular Octahedral Structure of Li_6 Cluster
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作者 ZHAO Yan-Ping LI Ping GOU Qing-Quan LIU Wei-Na 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第12期1407-1410,共4页
The formation mechanism for the regular octahedral structure of Liscluster is proposed. The curve of the total energy versus the separation R between any two neighboring nuclei has been calculated by using the method ... The formation mechanism for the regular octahedral structure of Liscluster is proposed. The curve of the total energy versus the separation R between any two neighboring nuclei has been calculated by using the method of Gou's modified arrangement channel quantum mechanics (MACQM). The result shows that the curve has a minimal energy of -44.736 89 a.u. at R = 5.07a0. When R approaches infinity, the total energy of six lithium atoms has the value of -44.568 17 a.u. So the binding energy of Li6 with respect to six lithium atoms is 0.1687 a.u. Therefore, the binding energy per atom for Li6 is 0.028 12 a.u., or 0.7637 eV, which is greater than the binding energy per atom of 0.453 eV for Li2 and the binding energy per atom of 0.494 eV for Li3 calculated in our previous work. This means that the Li6 cluster may be formed in a regular octahedral structure with a greater binding energy. 展开更多
关键词 Li6 cluster formation mechanism binding energy
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Finite Nuclei in a Relativistic mean—Field Theory with quadratic Couplings
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作者 GUOHua YANGShu 《Communications in Theoretical Physics》 SCIE CAS CSCD 2001年第5期573-578,共6页
A quadratic scalar and vector coupling model proposed recently has been applied to finite nuclei.The calculated results are compared with those of the derivative scalar coupling (DSC) model and the nonlinear Walecka m... A quadratic scalar and vector coupling model proposed recently has been applied to finite nuclei.The calculated results are compared with those of the derivative scalar coupling (DSC) model and the nonlinear Walecka model The results show that the spin-orbit splittings are improved considerably by quadratic couplings in contrast to the DSC model However,the binding energy per nucleon,rms charge radius,as well as the spin-orbit splittings in the quadratic model are still small compared with those given by the nonlinear Walecka model and the experimental data. 展开更多
关键词 quadratic couplings spin-orbit splittings binding energy rms charge radius
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Properties of Unsymmetrical Parabolic Confinement Potential Quantum Dot Qubit
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作者 CHEN Shi-Hua XIAO Jing-Lin 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第12期1287-1289,共3页
On the condition of electric-LO phonon strong coupling in unsymmetrical parabolic confinement potential quantum dot (QD), we obtain the eigenenergies of the ground state and the first-excited state, the eigenfunctio... On the condition of electric-LO phonon strong coupling in unsymmetrical parabolic confinement potential quantum dot (QD), we obtain the eigenenergies of the ground state and the first-excited state, the eigenfunctions of the ground state, and the first-excited state by using variational method of Pekar type. This system in QD may be employed as a two-level quantum system-qubit. When the electron is in the superposition state of the ground state and the first-excited state, we obtain the time evolution of the electron density. The relations both the probability density of electron and the period of oscillation with the electron-LO-phonon coupling strength, the confinement strengths in the xy-plane and the z-direction are discussed. 展开更多
关键词 quantum dot QUBIT binding energy
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Mobility in Driven Frenkel-Kontorova Model
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作者 滕爱萍 马桂花 许爱国 《Journal of China University of Mining and Technology》 2002年第2期203-209,共7页
The transport properties in a kind of simple system are studied within the framework of a generalized Frenkel Kontorova model where the chain is composed of two kinds of atoms. Its studied mobility includes two aspect... The transport properties in a kind of simple system are studied within the framework of a generalized Frenkel Kontorova model where the chain is composed of two kinds of atoms. Its studied mobility includes two aspects: the velocity mobility B v and the momentum mobility B m . The effective system temperatures for the two subchains, T e 1 and T e 2 are defined, respectively. For the underdamped case, the regime of nonlinear response becomes wider and more "steps" occur when the value of m increases. For m = 1, T e 1(F) = T e 2(F) . For m >1, T e 1(F) > T e 2(F) and the difference increases with the increase of m . The momentum transportation shows very different behavior from that of the velocity transportation. Within a prescribed intermediate "steps" of B v(F) or B m(F) , both of them decrease with the increase of F and B m(F) decreases more quickly. For the case of overdamping and nonzero temperature, the hysteresis interval becomes thinner and the transitions become smoother. The increase of m makes the hysteresis thinner and the transitions smoother. When T is high, all the transitions are smeared out, and the diatomic effects become unimportant. We expect these results contribute to the understanding of the atomic processes occurring at the interface of two materials when they are brought together and moved with respect to one another. 展开更多
关键词 Frenkel Kontorova model atom physics
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Cooling Curve of Strange Star in Strong Magnetic Field
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作者 WANG Xiao-Qin LUO Zhi-Quan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第11期1255-1257,共3页
In this paper, firstly, we investigate the neutrino emissivity from quark Urca process in strong magnetic field. Then, we discuss the heat capacity of strange stars in strong magnetic field. Finally, we give the cooli... In this paper, firstly, we investigate the neutrino emissivity from quark Urca process in strong magnetic field. Then, we discuss the heat capacity of strange stars in strong magnetic field. Finally, we give the cooling curve in strong magnetic field. In order to make a comparison, we also give the corresponding cooling curve in the case of null magnetic field. It turns out that strange stars cool faster in strong magnetic field than that without magnetic field. 展开更多
关键词 strong magnetic field strange star QUARK
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Topological Excitation in Skyrme Theory
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作者 DUAN Yi-Shi ZHANG Xin-Hui LIU Yu-Xiao 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第1期85-88,共4页
Based on the C-mapping topological current theory and the decomposition of gauge potential theory, we investigate knotted vortex lines and monopoles in Skyrme theory and simply discuss the branch processes (splitting... Based on the C-mapping topological current theory and the decomposition of gauge potential theory, we investigate knotted vortex lines and monopoles in Skyrme theory and simply discuss the branch processes (splitting, merging, and intersection) during the evolution of the monopoles. 展开更多
关键词 Skyrme theory KNOTS MONOPOLES
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Muon g - 2 in the Littlest Higgs Model
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作者 Farshid Tabbakh LIU Jing-Jing MA Wen-Gan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2006年第5期894-900,共7页
In this paper the anomalous magnetic dipole moment ofmuon in the littlest Higgs (LH) model is studied at one-loop level. We discuss the dependence of the contributions on the global symmetry breaking scale f, mizing... In this paper the anomalous magnetic dipole moment ofmuon in the littlest Higgs (LH) model is studied at one-loop level. We discuss the dependence of the contributions on the global symmetry breaking scale f, mizing angles c` and , and the Higgs triplet vacuum expectation value v' in the electroweak precision data preferring ranges. We find that the LH model can give a relatively small, but non-negligible extra weak contribution to the muon anomalous magnetic moment and can reduce the deviation of △aμ from 2.6σ for the SM to 2.5σ for the LH model. 展开更多
关键词 Littlest Higgs model anomalous magnetic dipole moment of muon
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Excitonic Doppler-Rabi Oscillations in a Moving Organic Slab
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作者 姚鸣 朱卡的 +2 位作者 袁晓忠 蒋逸文 吴卓杰 《Journal of Shanghai Jiaotong university(Science)》 EI 2005年第3期285-287,共3页
It is theoretically shown that excitonic Doppler-Rabi oscillations can occur in an organic slab moving along the axis of a high-Q cavity. Due to the N enhancement of the vacuum Rabi frequency, this effect can be more ... It is theoretically shown that excitonic Doppler-Rabi oscillations can occur in an organic slab moving along the axis of a high-Q cavity. Due to the N enhancement of the vacuum Rabi frequency, this effect can be more eas ily observed than that in a moving two-level atom. 展开更多
关键词 Doppler-Rabi oscillations EXCITON organic slab
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Resonant Continuum in Extended RMF Plus BCS Approximation
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作者 CAOLi-Gang MAZhong-Yu 《Communications in Theoretical Physics》 SCIE CAS CSCD 2004年第4期583-586,共4页
The contribution of the resonant continuum to pairing correlations is investigated in the relativistic mean field theory plus Bardeen–Cooper–Schrieffer (BCS) approximation with a constant pairing strength. The reson... The contribution of the resonant continuum to pairing correlations is investigated in the relativistic mean field theory plus Bardeen–Cooper–Schrieffer (BCS) approximation with a constant pairing strength. The resonance states with their widths in the continuum are considered explicitly. The numerical study is performed in an effective Lagrangian with the parameter set NLSH for neutron-rich nucleus <SUP>84</SUP>Ni. The results show that the effect of the proper treatment of the resonant continuum on pairing correlations for nucleus close to neutron drip line is important. It is found that the problem of an unphysical particle gas could be overcome when the pairing correlation is performed by using the resonant states instead of the discretized states in the continuum. 展开更多
关键词 resonant continuum relativistic mean-field pairing correlations
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