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arXiv 1907.03065hep-thmath-phmath.MP
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$d=3$ Minkowski空间中圆柱曲线变分原理与自旋粒子动力学

Variational principle for cylindrical curves and dynamics of spinning particles in $d=3$ Minkowski space

D. S. Kaparulin, S. L. Lyakhovich, I. A. Retuntsev

摘要:

我们从不可约的大质量自旋粒子的经典轨道位于闵可夫斯基空间中类时轴的圆柱上这一事实出发。假设圆柱上的所有经典路径都是规范等效的,我们导出了圆柱曲线的运动方程。这些方程是非拉格朗日的,但他们承认解释的条件极值问题的某一长度的功能在一类的路径进行常数分离条件。在作用量中加入拉格朗日乘子的常数分离条件后,得到了无条件变分原理。我们明确地验证了所得到的模型的状态位于庞加莱群的共轨上。与先前已知的理论的关系被证明。

英文摘要:

We proceed from the fact that the classical paths of irreducible massive spinning particle lie on a circular cylinder with the time-like axis in Minkowski space. Assuming that all the classical paths on the cylinder are gauge-equivalent, we derive the equations of motion for the cylindrical curves. These equations are non-Lagrangian, but they admit interpretation in terms of the conditional extremum problem for a certain length functional in the class of paths subjected to the constant separation conditions. The unconditional variational principle is obtained after inclusion of constant separation conditions with the Lagrange multipliers into the action. We explicitly verify that the states of the obtained model lie on the co-orbit of the Poincare group. The relationship with the previously known theory is demonstrated.

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