The coherent state is represented by a minimum uncertainty wave packet , the quantum correlation in these state is absent , so that it behaves as a quasi - classical state . it is such a property that leads to the results coincide completely with those obtained in semiclassical approximation 正是因为相干态是一个量子力学允许的最小的测不准波包,没有任何量子关联,可以看作是一个准经典态,才导致了完全量子场论和半经典近似下理论结果的完全一致性。
Gribov combined the nonrelativistic glauber multiple collisions theory with quantum field theory and fe ynman diagram technique so that relativistic kinematics could be included . based on glauber - gribov theory , b . z . kopeliovich et . al . developed green function method to calculate the shadowing effect in p - a drell - yan process Gribov将描述高能非相对论的多次碰撞的glauber理论与量子场论和费曼图联系了起来,从而glauber - gribov理论可以描述相对论情况下的多次散射,基于这一理论, b . z . kopeliovich等提出用格林函数方法计算p - a碰撞的drell - yan过程中的遮蔽效应。
Program : to present new research results in the representation theory of finite and infinite dimensional algebras , lie algebras , algebraic groups , quantum groups , superalgebras , vertex operator algebras , and related applications to other fields of mathematics and physics 会议内容:这次会议将交流我国及世界其它国家在以下领域中的最新研究成果:有限维及无限维结合代数的表示理论;李群,李代数,代数群,有限群,以及量子群的表示理论;顶点算子代数及其表示理论;与以上表示理论有关的数学物理及量子场论
Thus , for instance , it may come as a shock to mathematicians to learn that the schrodinger equation for the hydrogen atom is not a literally correct description of this atom , but only an approximation to a somewhat more correct equation taking account of spin , magnetic dipole , and relativistic effects ; and that this corrected equation is itself only an imperfect approximation to an infinite set of quantum field - theoretical equations 因此,举例来说,对数学家而言,了解到下述情形可能会令其惊愕不已,即薛定谔( schrodinger )的氢原子方程式并非是对该原子作出的一种绝然正确的描述,而仅仅是个近似值,趋近于一个在某种程度上更为正确的将自旋、磁性偶极子、以及相对论效应考虑在内的方程式;而这个得以纠正的方程式就其本身而言也只是一个不完美的近似值,趋近于无穷无尽的一整套量子场论方程式。
By calculating the feynman diagram in rtf , we find that when taking into account both the thermal photon emission , absorption and the virtual photon exchange processes , the infrared divergences at zero and finite temperature can be cancelled at the same time . the full quantum calculation results for soft photon radiation coincide completely with the poisson distribution obtained in the semiclassical approximation ( the coupling of the classical current and quantized field ) 通过实时温度场论下的费曼图计算,我们得到:将实光子的发射、吸收,虚光子的交换过程同时考虑时,零温场论中出现的和由温度效应引起的红外发散都能得到消除;并且完全量子场论下的软光子辐射几率与半经典近似下(经典的电流和量子化的电磁场之间的耦合)得到的泊松分布结果完全一致。
量子场论的法语:théorie des quanta du champ量子场论的日语:場の量子論量子场论的俄语:Квантовая теория поля量子场论的阿拉伯语:تصنيف:نظرية الحقل الكمومي; 量子场论的印尼文:teori medan kuantum; 量子场论什么意思:[quantum field theory] 结合量子力学和狭义相对论以解释亚原子现象的理论。特别是以电磁场等场的相互作用来描述亚原子粒子的相互作用。不过,这个场是量子化的,并且是以粒子来体现的。量子电动力学是描述带电粒子通过电磁场的量子场理论。量子色动力学描述的是强相互作用力。电弱理论是电磁力和弱相互作用力的统一理论,已经得到大量的实验支持,并且很可能推广到强相互作用力。包括引力在内的一些理论还...