高考问答员工安全承诺书合法:磁单极 求 翻译 或者直接给我讲解
来源：百度文库 编辑：高考问答 时间：2024/05/01 11:50:58
磁单极
Contrary to normal experience, theoretical physics predicts the existence of Magnetic monopoles. 保罗·狄拉克 observed in 1931 that, because electrical theory and magnetic theory show a certain symmetry, just as 量子理论 predicts that individual positive or negative electric charges can be observed without the opposing charge, isolated South or North magnetic poles should be observable. In practice, however, although charged particles like protons and electrons can be easily isolated as individual electrical charges, magnetic south and north poles do not appear in isolation. Using quantum theory Dirac showed that if magnetic monopoles exist, then one could explain why the observed 基本粒子 carry charges that are integral multiples of the charge of the electron. 夸克 carry fractional electric charge, but they do not appear as free particles.
In modern elementary particle theory, the "quantization" of charge is realised in a spontaneous breakdown of a non-abelian gauge symmetry. It should be noted that the monopoles predicted in certain Grand unified theories are different from the one originally thought of by Dirac. These monopoles, unlike that of elementary particles are solitons, namely localised energy packets. These monopoles, if at all they exist, contradict cosmological observations. A solution to this monopole problem in Cosmology gave rise to the currently interesting idea of inflation.
http://zh.wikipedia.org/wiki/%E7%A3%81
Contrary to normal experience, theoretical physics predicts the existence of Magnetic monopoles. 保罗·狄拉克 observed in 1931 that, because electrical theory and magnetic theory show a certain symmetry, just as 量子理论 predicts that individual positive or negative electric charges can be observed without the opposing charge, isolated South or North magnetic poles should be observable. In practice, however, although charged particles like protons and electrons can be easily isolated as individual electrical charges, magnetic south and north poles do not appear in isolation. Using quantum theory Dirac showed that if magnetic monopoles exist, then one could explain why the observed 基本粒子 carry charges that are integral multiples of the charge of the electron. 夸克 carry fractional electric charge, but they do not appear as free particles.
In modern elementary particle theory, the "quantization" of charge is realised in a spontaneous breakdown of a non-abelian gauge symmetry. It should be noted that the monopoles predicted in certain Grand unified theories are different from the one originally thought of by Dirac. These monopoles, unlike that of elementary particles are solitons, namely localised energy packets. These monopoles, if at all they exist, contradict cosmological observations. A solution to this monopole problem in Cosmology gave rise to the currently interesting idea of inflation.
http://zh.wikipedia.org/wiki/%E7%A3%81
大概意思是，磁单极不可以存在，不像electrons(-) 和 protons(+)可以分开。但是理论上磁单极可以存在。