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Curvature-induced noncommutativity of two different components of momentum for a particle on a hypersurface被引量：1
《Communications in Theoretical Physics》2021年第2期73-77,共5页Z Li X Yang Q H Liu 
This work is financially supported by National Natural Science Foundation of China under Grant No.11675051.
As a nonrelativistic particle constrained to remain on an(N−1)-dimensional((N≥2))hypersurface embedded in an N-dimensional Euclidean space,two different components pi and pj(i,j=1,2,3,...N)of the Cartesian momentum o...
关键词：constrained motion QUANTIZATION HYPERSURFACE Dirac brackets geometric momentum 
Symmetric Surface Momentum and Centripetal Force for a Particle on a Curved Surface
《Communications in Theoretical Physics》2018年第9期263-267,共5页M. S. Shikakhwa 
The Hermitian surface momentum operator for a particle confined to a 2D curved surface spanned by orthogonal coordinates and embedded in 3D space is expressed as a symmetric expression in derivatives with respect to t...
关键词：quantum mechanics on a curved surface geometric momentum quantum centripetal force 
Transformation Between Eigenfunctions of Three Components of Geometric Momentum on Two-Dimensional Sphere
《Communications in Theoretical Physics》2012年第7期31-33,共3页孙浩然 寻大毛 唐良辉 刘全慧 
Supported by National Natural Science Foundation of China under Grant No. 11175063
A technique of coordinate transformation is devised to overcome the computational difficulty associated with the direct transformation between eigenfunctions of three components of the geometric momentum on two-dimens...
关键词：quantum mechanics differential geometry partial differential equations 
Large Number,Dark Matter,Dark Energy,and Superstructures in the Universe
《Communications in Theoretical Physics》2009年第3期575-576,共2页HUANG Wu-Liang HUANG Xiao-Dong 
Since there may exist dark matter particles ν and δ with mass - 10^-1 e V in the universe, the superstructures with a scale of 10^19 solar masses （large number A - 10^19） appeared during the era near and before th...
关键词：large number dark matter dark energy stable elementary particle SUPERSTRUCTURE 
Electron-Helium Atom Collisions in the Presence of a Bichromatic Laser Field
《Communications in Theoretical Physics》2008年第8期477-480,共4页ZHU Zun-Lue LIANG Ming-Chao SUN Jin-Feng 
supported by National Natural Science Foundation of China under Grant No.10574039;the Science Foundation for Young Scientists of Henan Normal University under Grant No.2005004
The differential cross section （DCS） for electron-helium atom collisions in the presence of a bichromatic CO2 laser field is investigated as a function of the scattering angle θ by employing first-Born approximati...
关键词：differential cross section bichromatic laser field first Born approximation scattering geometry 
A Theory of Evolving Natural Constants Based on the Unification of General Theory of Relativity and Dirac’s Large Number Hypothesis
《Communications in Theoretical Physics》2005年第1期81-88,共8页PENGHuan-Wu 
Talcing Dirac's large number hypothesis as true, we have shown [Commun.Theor. Phys. (Beijing, China) 42 (2004) 703] the inconsistency of applying Einstein's theory ofgeneral relativity with fixed gravitation constant ...
关键词：general theory of relativity natural constants dirac's large numberhypothesis 
Estimate Totel Number of the Earth Atmospheric Particle with Standard Atmosphere model
《Communications in Theoretical Physics》2001年第5期639-640,共2页GAOChong－Yi 
The total number of atmospheric particle (AP) is an important datum for planetary science and geoscience. Estimating entire AP number is also a familiar question in general physics. With standard atmosphere model, con...
关键词：planetary atmosphere earth atmosphere neutral atmosphere total number of atmospheric particle standard atmosphere model effect of uneven in the earth surface estimation 
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