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In mathematical physics, the Gordon-decomposition (named after Walter Gordon one of the discoverers of the Klein-Gordon equation) of the Dirac current is a splitting of the charge or particle-number current into a part that arises from the motion of the center of mass of the particles and a part that arises from gradients of the spin density. It makes explicit use of the of the Dirac equation and so it applies only to "on-shell" solutions of the Dirac equation. ==Original Statement== For any solution of the massive Dirac equation : the Lorentz covariant number-current can be expressed as : where : is the spinor generator of Lorentz transformations. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Gordon Decomposition」の詳細全文を読む スポンサード リンク
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